72257073 has 16 divisors (see below), whose sum is σ = 112185216. Its totient is φ = 40510080.

The previous prime is 72257069. The next prime is 72257093. The reversal of 72257073 is 37075227.

It is not a de Polignac number, because 72257073 - 2² = 72257069 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72257093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31348 + ... + 33573.

It is an arithmetic number, because the mean of its divisors is an integer number (7011576).

Almost surely, 2^72257073 is an apocalyptic number.

It is an amenable number.

72257073 is a deficient number, since it is larger than the sum of its proper divisors (39928143).

72257073 is a wasteful number, since it uses less digits than its factorization.

72257073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64984.

The product of its (nonzero) digits is 20580, while the sum is 33.

The square root of 72257073 is about 8500.4160486414. The cubic root of 72257073 is about 416.5113000119.

The spelling of 72257073 in words is "seventy-two million, two hundred fifty-seven thousand, seventy-three".