78636412 has 12 divisors (see below), whose sum is σ = 137893000. Its totient is φ = 39238416.

The previous prime is 78636409. The next prime is 78636427. The reversal of 78636412 is 21463687.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17703 + ... + 21694.

Almost surely, 2^78636412 is an apocalyptic number.

It is an amenable number.

78636412 is a deficient number, since it is larger than the sum of its proper divisors (59256588).

78636412 is a wasteful number, since it uses less digits than its factorization.

78636412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39900 (or 39898 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 78636412 is about 8867.7174064130. The cubic root of 78636412 is about 428.4247610083.

The spelling of 78636412 in words is "seventy-eight million, six hundred thirty-six thousand, four hundred twelve".