72727857 has 12 divisors (see below), whose sum is σ = 105259024. Its totient is φ = 48389400.

The previous prime is 72727843. The next prime is 72727859. The reversal of 72727857 is 75872727.

It is a happy number.

It is not a de Polignac number, because 72727857 - 2⁷ = 72727729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72727859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3019 + ... + 12432.

Almost surely, 2^72727857 is an apocalyptic number.

It is an amenable number.

72727857 is a deficient number, since it is larger than the sum of its proper divisors (32531167).

72727857 is a wasteful number, since it uses less digits than its factorization.

72727857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15980 (or 15977 counting only the distinct ones).

The product of its digits is 384160, while the sum is 45.

The square root of 72727857 is about 8528.0629101807. The cubic root of 72727857 is about 417.4139222784.

It can be divided in two parts, 7272 and 7857, that added together give a square (15129 = 123²).

The spelling of 72727857 in words is "seventy-two million, seven hundred twenty-seven thousand, eight hundred fifty-seven".