16997904 has 240 divisors, whose sum is σ = 62763840. Its totient is φ = 4354560.

The previous prime is 16997887. The next prime is 16997917. The reversal of 16997904 is 40979961.

It is a self number, because there is not a number n which added to its sum of digits gives 16997904.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232812 + ... + 232884.

It is an arithmetic number, because the mean of its divisors is an integer number (261516).

Almost surely, 2^16997904 is an apocalyptic number.

16997904 is a gapful number since it is divisible by the number (14) 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 16997904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31381920).

16997904 is an abundant number, since it is smaller than the sum of its proper divisors (45765936).

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

16997904 is a wasteful number, since it uses less digits than its factorization.

16997904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 96 counting only the distinct ones).

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

The square root of 16997904 is about 4122.8514404475. The cubic root of 16997904 is about 257.1175911683.

The spelling of 16997904 in words is "sixteen million, nine hundred ninety-seven thousand, nine hundred four".