72444515 has 48 divisors (see below), whose sum is σ = 105284928. Its totient is φ = 47520000.

The previous prime is 72444469. The next prime is 72444521. The reversal of 72444515 is 51544427.

It is not a de Polignac number, because 72444515 - 2⁶ = 72444451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 479690 + ... + 479840.

It is an arithmetic number, because the mean of its divisors is an integer number (2193436).

Almost surely, 2^72444515 is an apocalyptic number.

72444515 is a deficient number, since it is larger than the sum of its proper divisors (32840413).

72444515 is a wasteful number, since it uses less digits than its factorization.

72444515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 241 counting only the distinct ones).

The product of its digits is 22400, while the sum is 32.

The square root of 72444515 is about 8511.4343679547. The cubic root of 72444515 is about 416.8711462128.

The spelling of 72444515 in words is "seventy-two million, four hundred forty-four thousand, five hundred fifteen".