16978064 has 10 divisors (see below), whose sum is σ = 32895030. Its totient is φ = 8489024.

The previous prime is 16978061. The next prime is 16978097. The reversal of 16978064 is 46087961.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 102400 = 4108^2 + 320^2 .

It is not an unprimeable number, because it can be changed into a prime (16978061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530549 + ... + 530580.

It is an arithmetic number, because the mean of its divisors is an integer number (3289503).

Almost surely, 2^16978064 is an apocalyptic number.

It is an amenable number.

16978064 is a deficient number, since it is larger than the sum of its proper divisors (15916966).

16978064 is a wasteful number, since it uses less digits than its factorization.

16978064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061137 (or 1061131 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 16978064 is about 4120.4446362013. Note that the first 3 decimals coincide. The cubic root of 16978064 is about 257.0175161039.

The spelling of 16978064 in words is "sixteen million, nine hundred seventy-eight thousand, sixty-four".