16979904 has 84 divisors (see below), whose sum is σ = 49926240. Its totient is φ = 5514240.

The previous prime is 16979903. The next prime is 16979933. The reversal of 16979904 is 40997961.

It is a self number, because there is not a number n which added to its sum of digits gives 16979904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16979903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23257 + ... + 23975.

It is an arithmetic number, because the mean of its divisors is an integer number (594360).

Almost surely, 2^16979904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16979904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24963120).

16979904 is an abundant number, since it is smaller than the sum of its proper divisors (32946336).

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

16979904 is a wasteful number, since it uses less digits than its factorization.

16979904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 16979904 is about 4120.6679070267. The cubic root of 16979904 is about 257.0268005380.

The spelling of 16979904 in words is "sixteen million, nine hundred seventy-nine thousand, nine hundred four".