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11901830 = 253138393
BaseRepresentation
bin101101011001…
…101110000110
3211101200020112
4231121232012
511021324310
61103033022
7203110133
oct55315606
924350215
1011901830
11679a026
123b9b772
132609405
14181b58a
1510a1705
hexb59b86

11901830 has 16 divisors (see below), whose sum is σ = 22114944. Its totient is φ = 4607040.

The previous prime is 11901821. The next prime is 11901899. The reversal of 11901830 is 3810911.

It is a junction number, because it is equal to n+sod(n) for n = 11901796 and 11901805.

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 7 ways as a sum of consecutive naturals, for example, 18887 + ... + 19506.

It is an arithmetic number, because the mean of its divisors is an integer number (1382184).

Almost surely, 211901830 is an apocalyptic number.

11901830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11901830 is a deficient number, since it is larger than the sum of its proper divisors (10213114).

11901830 is a wasteful number, since it uses less digits than its factorization.

11901830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38431.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 11901830 is about 3449.9028971842. The cubic root of 11901830 is about 228.3168238310.

The spelling of 11901830 in words is "eleven million, nine hundred one thousand, eight hundred thirty".

Divisors: 1 2 5 10 31 62 155 310 38393 76786 191965 383930 1190183 2380366 5950915 11901830