16978464 has 96 divisors (see below), whose sum is σ = 50783040. Its totient is φ = 5515776.

The previous prime is 16978459. The next prime is 16978487. The reversal of 16978464 is 46487961.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36924 + ... + 37380.

It is an arithmetic number, because the mean of its divisors is an integer number (528990).

Almost surely, 2^16978464 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 16978464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25391520).

16978464 is an abundant number, since it is smaller than the sum of its proper divisors (33804576).

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

16978464 is a wasteful number, since it uses less digits than its factorization.

16978464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 505 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 16978464 is about 4120.4931743664. The cubic root of 16978464 is about 257.0195345162.

The spelling of 16978464 in words is "sixteen million, nine hundred seventy-eight thousand, four hundred sixty-four".