72540404 has 24 divisors (see below), whose sum is σ = 134621760. Its totient is φ = 34105536.

The previous prime is 72540371. The next prime is 72540409. The reversal of 72540404 is 40404527.

It is a super-2 number, since 2×72540404² = 10524220424966432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72540409) 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, 6929 + ... + 13895.

It is an arithmetic number, because the mean of its divisors is an integer number (5609240).

Almost surely, 2^72540404 is an apocalyptic number.

It is an amenable number.

72540404 is a deficient number, since it is larger than the sum of its proper divisors (62081356).

72540404 is a wasteful number, since it uses less digits than its factorization.

72540404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127 (or 7125 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 72540404 is about 8517.0654570691. The cubic root of 72540404 is about 417.0549914346.

The spelling of 72540404 in words is "seventy-two million, five hundred forty thousand, four hundred four".