86721392 has 20 divisors (see below), whose sum is σ = 171599136. Its totient is φ = 42437760.

The previous prime is 86721361. The next prime is 86721413. The reversal of 86721392 is 29312768.

It is a congruent number.

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, 56909 + ... + 58412.

Almost surely, 2^86721392 is an apocalyptic number.

It is an amenable number.

86721392 is a deficient number, since it is larger than the sum of its proper divisors (84877744).

86721392 is a wasteful number, since it uses less digits than its factorization.

86721392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115376 (or 115370 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 86721392 is about 9312.4321205580. The cubic root of 86721392 is about 442.6312581555.

The spelling of 86721392 in words is "eighty-six million, seven hundred twenty-one thousand, three hundred ninety-two".