72071857 has 32 divisors (see below), whose sum is σ = 93623040. Its totient is φ = 54405120.

The previous prime is 72071849. The next prime is 72071897. The reversal of 72071857 is 75817027.

It is not a de Polignac number, because 72071857 - 2³ = 72071849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72071837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55269 + ... + 56557.

It is an arithmetic number, because the mean of its divisors is an integer number (2925720).

Almost surely, 2^72071857 is an apocalyptic number.

It is an amenable number.

72071857 is a deficient number, since it is larger than the sum of its proper divisors (21551183).

72071857 is a wasteful number, since it uses less digits than its factorization.

72071857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 72071857 is about 8489.5145326456. The cubic root of 72071857 is about 416.1551154316.

The spelling of 72071857 in words is "seventy-two million, seventy-one thousand, eight hundred fifty-seven".