72464857 has 4 divisors (see below), whose sum is σ = 72620496. Its totient is φ = 72309220.

The previous prime is 72464849. The next prime is 72464867. The reversal of 72464857 is 75846427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72464857 - 2³ = 72464849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72464867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77119 + ... + 78052.

It is an arithmetic number, because the mean of its divisors is an integer number (18155124).

Almost surely, 2^72464857 is an apocalyptic number.

It is an amenable number.

72464857 is a deficient number, since it is larger than the sum of its proper divisors (155639).

72464857 is a wasteful number, since it uses less digits than its factorization.

72464857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155638.

The product of its digits is 376320, while the sum is 43.

The square root of 72464857 is about 8512.6292648041. The cubic root of 72464857 is about 416.9101608954.

The spelling of 72464857 in words is "seventy-two million, four hundred sixty-four thousand, eight hundred fifty-seven".