16404957 has 16 divisors (see below), whose sum is σ = 25361280. Its totient is φ = 10460736.

The previous prime is 16404953. The next prime is 16404959. The reversal of 16404957 is 75940461.

16404957 is a `hidden beast` number, since 1 + 640 + 4 + 9 + 5 + 7 = 666.

It is not a de Polignac number, because 16404957 - 2² = 16404953 is a prime.

It is a super-2 number, since 2×16404957² = 538245228343698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16404953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12588 + ... + 13829.

It is an arithmetic number, because the mean of its divisors is an integer number (1585080).

Almost surely, 2^16404957 is an apocalyptic number.

It is an amenable number.

16404957 is a deficient number, since it is larger than the sum of its proper divisors (8956323).

16404957 is a wasteful number, since it uses less digits than its factorization.

16404957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26449 (or 26443 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 16404957 is about 4050.3033219748. The cubic root of 16404957 is about 254.0924137243.

The spelling of 16404957 in words is "sixteen million, four hundred four thousand, nine hundred fifty-seven".