78872492 has 24 divisors (see below), whose sum is σ = 142296000. Its totient is φ = 38230416.

The previous prime is 78872471. The next prime is 78872501. The reversal of 78872492 is 29427887.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22259 + ... + 25557.

It is an arithmetic number, because the mean of its divisors is an integer number (5929000).

Almost surely, 2^78872492 is an apocalyptic number.

It is an amenable number.

78872492 is a deficient number, since it is larger than the sum of its proper divisors (63423508).

78872492 is a wasteful number, since it uses less digits than its factorization.

78872492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485 (or 3483 counting only the distinct ones).

The product of its digits is 451584, while the sum is 47.

The square root of 78872492 is about 8881.0186352693. The cubic root of 78872492 is about 428.8530675555.

The spelling of 78872492 in words is "seventy-eight million, eight hundred seventy-two thousand, four hundred ninety-two".