978971718 has 16 divisors (see below), whose sum is σ = 1972031040. Its totient is φ = 323975976.

The previous prime is 978971717. The next prime is 978971729. The reversal of 978971718 is 817179879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978971711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586080 + ... + 587747.

It is an arithmetic number, because the mean of its divisors is an integer number (123251940).

Almost surely, 2^978971718 is an apocalyptic number.

978971718 is an abundant number, since it is smaller than the sum of its proper divisors (993059322).

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

978971718 is a wasteful number, since it uses less digits than its factorization.

978971718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173971.

The product of its digits is 1778112, while the sum is 57.

The square root of 978971718 is about 31288.5237427399. The cubic root of 978971718 is about 992.9408584430.

The spelling of 978971718 in words is "nine hundred seventy-eight million, nine hundred seventy-one thousand, seven hundred eighteen".