72401615 has 32 divisors (see below), whose sum is σ = 103118400. Its totient is φ = 48107520.

The previous prime is 72401599. The next prime is 72401621. The reversal of 72401615 is 51610427.

It is not a de Polignac number, because 72401615 - 2⁴ = 72401599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77471 + ... + 78399.

It is an arithmetic number, because the mean of its divisors is an integer number (3222450).

Almost surely, 2^72401615 is an apocalyptic number.

72401615 is a deficient number, since it is larger than the sum of its proper divisors (30716785).

72401615 is a wasteful number, since it uses less digits than its factorization.

72401615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72401615 is about 8508.9138554812. The cubic root of 72401615 is about 416.7888427495.

The spelling of 72401615 in words is "seventy-two million, four hundred one thousand, six hundred fifteen".