86907728 has 10 divisors (see below), whose sum is σ = 168383754. Its totient is φ = 43453856.

The previous prime is 86907719. The next prime is 86907749. The reversal of 86907728 is 82770968.

It can be written as a sum of positive squares in only one way, i.e., 54051904 + 32855824 = 7352^2 + 5732^2 .

It is a super-2 number, since 2×86907728² = 15105906372243968, 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 as a sum of consecutive naturals, namely, 2715851 + ... + 2715882.

Almost surely, 2^86907728 is an apocalyptic number.

It is an amenable number.

86907728 is a deficient number, since it is larger than the sum of its proper divisors (81476026).

86907728 is a wasteful number, since it uses less digits than its factorization.

86907728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431741 (or 5431735 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 86907728 is about 9322.4314424940. The cubic root of 86907728 is about 442.9480547911.

The spelling of 86907728 in words is "eighty-six million, nine hundred seven thousand, seven hundred twenty-eight".