78578937 has 16 divisors (see below), whose sum is σ = 116599680. Its totient is φ = 52302096.

The previous prime is 78578923. The next prime is 78578939. The reversal of 78578937 is 73987587.

It is not a de Polignac number, because 78578937 - 2⁷ = 78578809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78578939) 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, 18103 + ... + 22019.

It is an arithmetic number, because the mean of its divisors is an integer number (7287480).

Almost surely, 2^78578937 is an apocalyptic number.

It is an amenable number.

78578937 is a deficient number, since it is larger than the sum of its proper divisors (38020743).

78578937 is a wasteful number, since it uses less digits than its factorization.

78578937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669 (or 4663 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 78578937 is about 8864.4761266529. The cubic root of 78578937 is about 428.3203576576.

The spelling of 78578937 in words is "seventy-eight million, five hundred seventy-eight thousand, nine hundred thirty-seven".