72530857 has 8 divisors (see below), whose sum is σ = 87768576. Its totient is φ = 58512192.

The previous prime is 72530851. The next prime is 72530873. The reversal of 72530857 is 75803527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72530857 - 2¹⁵ = 72498089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72530851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304633 + ... + 304870.

It is an arithmetic number, because the mean of its divisors is an integer number (10971072).

Almost surely, 2^72530857 is an apocalyptic number.

It is an amenable number.

72530857 is a deficient number, since it is larger than the sum of its proper divisors (15237719).

72530857 is a wasteful number, since it uses less digits than its factorization.

72530857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609527.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 72530857 is about 8516.5049756341. The cubic root of 72530857 is about 417.0366945110.

The spelling of 72530857 in words is "seventy-two million, five hundred thirty thousand, eight hundred fifty-seven".