78047924 has 48 divisors (see below), whose sum is σ = 147987840. Its totient is φ = 35925120.

The previous prime is 78047923. The next prime is 78047933. The reversal of 78047924 is 42974087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78047923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431114 + ... + 431294.

It is an arithmetic number, because the mean of its divisors is an integer number (3083080).

Almost surely, 2^78047924 is an apocalyptic number.

It is an amenable number.

78047924 is a deficient number, since it is larger than the sum of its proper divisors (69939916).

78047924 is a wasteful number, since it uses less digits than its factorization.

78047924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 78047924 is about 8834.4736119364. The cubic root of 78047924 is about 427.3533557650.

The spelling of 78047924 in words is "seventy-eight million, forty-seven thousand, nine hundred twenty-four".