192978864 has 60 divisors (see below), whose sum is σ = 581622496. Its totient is φ = 59377536.

The previous prime is 192978859. The next prime is 192978869. The reversal of 192978864 is 468879291.

It is an interprime number because it is at equal distance from previous prime (192978859) and next prime (192978869).

It is a self number, because there is not a number n which added to its sum of digits gives 192978864.

It is not an unprimeable number, because it can be changed into a prime (192978869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49672 + ... + 53415.

Almost surely, 2^192978864 is an apocalyptic number.

It is an amenable number.

192978864 is an abundant number, since it is smaller than the sum of its proper divisors (388643632).

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

192978864 is a wasteful number, since it uses less digits than its factorization.

192978864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103114 (or 103105 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 192978864 is about 13891.6832673366. The cubic root of 192978864 is about 577.8785599124.

The spelling of 192978864 in words is "one hundred ninety-two million, nine hundred seventy-eight thousand, eight hundred sixty-four".