78947924 has 12 divisors (see below), whose sum is σ = 150718848. Its totient is φ = 35885400.

The previous prime is 78947923. The next prime is 78947927. The reversal of 78947924 is 42974987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78947923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897092 + ... + 897179.

It is an arithmetic number, because the mean of its divisors is an integer number (12559904).

Almost surely, 2^78947924 is an apocalyptic number.

It is an amenable number.

78947924 is a deficient number, since it is larger than the sum of its proper divisors (71770924).

78947924 is a wasteful number, since it uses less digits than its factorization.

78947924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794286 (or 1794284 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 78947924 is about 8885.2644305051. The cubic root of 78947924 is about 428.9897393597.

The spelling of 78947924 in words is "seventy-eight million, nine hundred forty-seven thousand, nine hundred twenty-four".