78724364 has 12 divisors (see below), whose sum is σ = 138133800. Its totient is φ = 39257568.

The previous prime is 78724361. The next prime is 78724411. The reversal of 78724364 is 46342787.

It is not an unprimeable number, because it can be changed into a prime (78724361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24449 + ... + 27480.

It is an arithmetic number, because the mean of its divisors is an integer number (11511150).

Almost surely, 2^78724364 is an apocalyptic number.

It is an amenable number.

78724364 is a deficient number, since it is larger than the sum of its proper divisors (59409436).

78724364 is a wasteful number, since it uses less digits than its factorization.

78724364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52312 (or 52310 counting only the distinct ones).

The product of its digits is 225792, while the sum is 41.

The square root of 78724364 is about 8872.6751321121. The cubic root of 78724364 is about 428.5844273941.

The spelling of 78724364 in words is "seventy-eight million, seven hundred twenty-four thousand, three hundred sixty-four".