78408630 has 48 divisors (see below), whose sum is σ = 214596720. Its totient is φ = 19808064.

The previous prime is 78408619. The next prime is 78408719. The reversal of 78408630 is 3680487.

It is a super-2 number, since 2×78408630² = 12295826516953800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21217 + ... + 24636.

It is an arithmetic number, because the mean of its divisors is an integer number (4470765).

Almost surely, 2^78408630 is an apocalyptic number.

78408630 is an abundant number, since it is smaller than the sum of its proper divisors (136188090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78408630 is a wasteful number, since it uses less digits than its factorization.

78408630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45885 (or 45882 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 78408630 is about 8854.8647646364. The cubic root of 78408630 is about 428.0106957178.

The spelling of 78408630 in words is "seventy-eight million, four hundred eight thousand, six hundred thirty".