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10918420 = 2251721889
BaseRepresentation
bin101001101001…
…101000010100
3202112201020221
4221221220110
510243342140
61030004124
7161543062
oct51515024
922481227
1010918420
116188197
1237a6644
132353906
141643032
15e5a14a
hexa69a14

10918420 has 36 divisors (see below), whose sum is σ = 24369660. Its totient is φ = 4108288.

The previous prime is 10918409. The next prime is 10918433. The reversal of 10918420 is 2481901.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 498436 + 10419984 = 706^2 + 3228^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4836 + ... + 6724.

It is an arithmetic number, because the mean of its divisors is an integer number (676935).

Almost surely, 210918420 is an apocalyptic number.

10918420 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 10918420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12184830).

10918420 is an abundant number, since it is smaller than the sum of its proper divisors (13451240).

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

10918420 is a wasteful number, since it uses less digits than its factorization.

10918420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 10918420 is about 3304.3032548481. The cubic root of 10918420 is about 221.8468494339.

The spelling of 10918420 in words is "ten million, nine hundred eighteen thousand, four hundred twenty".

Divisors: 1 2 4 5 10 17 20 34 68 85 170 289 340 578 1156 1445 1889 2890 3778 5780 7556 9445 18890 32113 37780 64226 128452 160565 321130 545921 642260 1091842 2183684 2729605 5459210 10918420