678971172 has 36 divisors (see below), whose sum is σ = 1741387088. Its totient is φ = 205748400.

The previous prime is 678971147. The next prime is 678971173. The reversal of 678971172 is 271179876.

It is a super-2 number, since 2×678971172² = 922003704814107168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678971173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232354 + ... + 235257.

Almost surely, 2^678971172 is an apocalyptic number.

It is an amenable number.

678971172 is an abundant number, since it is smaller than the sum of its proper divisors (1062415916).

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

678971172 is a wasteful number, since it uses less digits than its factorization.

678971172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467640 (or 467627 counting only the distinct ones).

The product of its digits is 296352, while the sum is 48.

The square root of 678971172 is about 26057.0752771680. The cubic root of 678971172 is about 878.9222221999.

The spelling of 678971172 in words is "six hundred seventy-eight million, nine hundred seventy-one thousand, one hundred seventy-two".