78931630 has 32 divisors (see below), whose sum is σ = 149615424. Its totient is φ = 29922816.

The previous prime is 78931613. The next prime is 78931631. The reversal of 78931630 is 3613987.

It is a self number, because there is not a number n which added to its sum of digits gives 78931630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78931631) 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, 24472 + ... + 27508.

It is an arithmetic number, because the mean of its divisors is an integer number (4675482).

Almost surely, 2^78931630 is an apocalyptic number.

78931630 is a deficient number, since it is larger than the sum of its proper divisors (70683794).

78931630 is a wasteful number, since it uses less digits than its factorization.

78931630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 78931630 is about 8884.3474718181. The cubic root of 78931630 is about 428.9602243774.

The spelling of 78931630 in words is "seventy-eight million, nine hundred thirty-one thousand, six hundred thirty".