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11081720 = 23513101211
BaseRepresentation
bin101010010001…
…011111111000
3202212000021002
4222101133320
510314103340
61033304132
7163123136
oct52213770
922760232
1011081720
116289951
123865048
1323b0040
141686756
15e8d715
hexa917f8

11081720 has 64 divisors (see below), whose sum is σ = 27246240. Its totient is φ = 4032000.

The previous prime is 11081701. The next prime is 11081737. The reversal of 11081720 is 2718011.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11081692 and 11081701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52415 + ... + 52625.

Almost surely, 211081720 is an apocalyptic number.

11081720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11081720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13623120).

11081720 is an abundant number, since it is smaller than the sum of its proper divisors (16164520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11081720 is a wasteful number, since it uses less digits than its factorization.

11081720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 11081720 is about 3328.9217473530. The cubic root of 11081720 is about 222.9473891721.

Adding to 11081720 its reverse (2718011), we get a palindrome (13799731).

The spelling of 11081720 in words is "eleven million, eighty-one thousand, seven hundred twenty".

Divisors: 1 2 4 5 8 10 13 20 26 40 52 65 101 104 130 202 211 260 404 422 505 520 808 844 1010 1055 1313 1688 2020 2110 2626 2743 4040 4220 5252 5486 6565 8440 10504 10972 13130 13715 21311 21944 26260 27430 42622 52520 54860 85244 106555 109720 170488 213110 277043 426220 554086 852440 1108172 1385215 2216344 2770430 5540860 11081720