78621412 has 12 divisors (see below), whose sum is σ = 140515200. Its totient is φ = 38474216.

The previous prime is 78621401. The next prime is 78621421. The reversal of 78621412 is 21412687.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208912 + ... + 209287.

It is an arithmetic number, because the mean of its divisors is an integer number (11709600).

Almost surely, 2^78621412 is an apocalyptic number.

It is an amenable number.

78621412 is a deficient number, since it is larger than the sum of its proper divisors (61893788).

78621412 is a wasteful number, since it uses less digits than its factorization.

78621412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418250 (or 418248 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 78621412 is about 8866.8716016417. The cubic root of 78621412 is about 428.3975184120.

The spelling of 78621412 in words is "seventy-eight million, six hundred twenty-one thousand, four hundred twelve".