17996992 has 56 divisors (see below), whose sum is σ = 39030656. Its totient is φ = 8183808.

The previous prime is 17996987. The next prime is 17997037. The reversal of 17996992 is 29969971.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80593 + ... + 80815.

It is an arithmetic number, because the mean of its divisors is an integer number (696976).

Almost surely, 2^17996992 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 17996992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19515328).

17996992 is an abundant number, since it is smaller than the sum of its proper divisors (21033664).

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

17996992 is a wasteful number, since it uses less digits than its factorization.

17996992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 335 counting only the distinct ones).

The product of its digits is 551124, while the sum is 52.

The square root of 17996992 is about 4242.2861761083. The cubic root of 17996992 is about 262.0595401074.

The spelling of 17996992 in words is "seventeen million, nine hundred ninety-six thousand, nine hundred ninety-two".