72463815 has 96 divisors (see below), whose sum is σ = 142222080. Its totient is φ = 35271936.

The previous prime is 72463799. The next prime is 72463819. The reversal of 72463815 is 51836427.

72463815 is a `hidden beast` number, since 7 + 2 + 4 + 638 + 15 = 666.

It is not a de Polignac number, because 72463815 - 2⁴ = 72463799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72463815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72463819) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 992619 + ... + 992691.

It is an arithmetic number, because the mean of its divisors is an integer number (1481480).

Almost surely, 2^72463815 is an apocalyptic number.

72463815 is a deficient number, since it is larger than the sum of its proper divisors (69758265).

72463815 is a wasteful number, since it uses less digits than its factorization.

72463815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 143 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 72463815 is about 8512.5680614019. The cubic root of 72463815 is about 416.9081625821.

The spelling of 72463815 in words is "seventy-two million, four hundred sixty-three thousand, eight hundred fifteen".