72004557 has 8 divisors (see below), whose sum is σ = 96052000. Its totient is φ = 47980080.

The previous prime is 72004549. The next prime is 72004561. The reversal of 72004557 is 75540027.

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

It is not a de Polignac number, because 72004557 - 2³ = 72004549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72004567) 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, 3882 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (12006500).

Almost surely, 2^72004557 is an apocalyptic number.

It is an amenable number.

72004557 is a deficient number, since it is larger than the sum of its proper divisors (24047443).

72004557 is a wasteful number, since it uses less digits than its factorization.

72004557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11483.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 72004557 is about 8485.5498937900. The cubic root of 72004557 is about 416.0255412234.

The spelling of 72004557 in words is "seventy-two million, four thousand, five hundred fifty-seven".