72618405 has 16 divisors (see below), whose sum is σ = 116377344. Its totient is φ = 38667200.

The previous prime is 72618397. The next prime is 72618463. The reversal of 72618405 is 50481627.

It is not a de Polignac number, because 72618405 - 2³ = 72618397 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6580 + ... + 13730.

It is an arithmetic number, because the mean of its divisors is an integer number (7273584).

Almost surely, 2^72618405 is an apocalyptic number.

It is an amenable number.

72618405 is a deficient number, since it is larger than the sum of its proper divisors (43758939).

72618405 is a wasteful number, since it uses less digits than its factorization.

72618405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 72618405 is about 8521.6433274340. The cubic root of 72618405 is about 417.2044210477.

The spelling of 72618405 in words is "seventy-two million, six hundred eighteen thousand, four hundred five".