15553940 has 24 divisors (see below), whose sum is σ = 33718272. Its totient is φ = 6020640.

The previous prime is 15553939. The next prime is 15553969. The reversal of 15553940 is 4935551.

It is a junction number, because it is equal to n+sod(n) for n = 15553897 and 15553906.

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, 11924 + ... + 13163.

It is an arithmetic number, because the mean of its divisors is an integer number (1404928).

Almost surely, 2^15553940 is an apocalyptic number.

15553940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15553940 is an abundant number, since it is smaller than the sum of its proper divisors (18164332).

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

15553940 is a wasteful number, since it uses less digits than its factorization.

15553940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25127 (or 25125 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 15553940 is about 3943.8483743674. The cubic root of 15553940 is about 249.6204373538.

The spelling of 15553940 in words is "fifteen million, five hundred fifty-three thousand, nine hundred forty".