16978970 has 16 divisors (see below), whose sum is σ = 32171040. Its totient is φ = 6434064.

The previous prime is 16978957. The next prime is 16978981. The reversal of 16978970 is 7987961.

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, 44492 + ... + 44871.

It is an arithmetic number, because the mean of its divisors is an integer number (2010690).

Almost surely, 2^16978970 is an apocalyptic number.

16978970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16978970 is a deficient number, since it is larger than the sum of its proper divisors (15192070).

16978970 is a wasteful number, since it uses less digits than its factorization.

16978970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89389.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 16978970 is about 4120.5545743261. The cubic root of 16978970 is about 257.0220877623.

The spelling of 16978970 in words is "sixteen million, nine hundred seventy-eight thousand, nine hundred seventy".