978486172 has 12 divisors (see below), whose sum is σ = 1723258600. Its totient is φ = 486126576.

The previous prime is 978486169. The next prime is 978486193. The reversal of 978486172 is 271684879.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778422 + ... + 779677.

Almost surely, 2^978486172 is an apocalyptic number.

It is an amenable number.

978486172 is a deficient number, since it is larger than the sum of its proper divisors (744772428).

978486172 is a wasteful number, since it uses less digits than its factorization.

978486172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558260 (or 1558258 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 978486172 is about 31280.7636096052. The cubic root of 978486172 is about 992.7766731788.

The spelling of 978486172 in words is "nine hundred seventy-eight million, four hundred eighty-six thousand, one hundred seventy-two".