72476815 has 4 divisors (see below), whose sum is σ = 86972184. Its totient is φ = 57981448.

The previous prime is 72476783. The next prime is 72476837. The reversal of 72476815 is 51867427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51867427 = 3229 ⋅16063.

It is a cyclic number.

It is not a de Polignac number, because 72476815 - 2⁵ = 72476783 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7247677 + ... + 7247686.

It is an arithmetic number, because the mean of its divisors is an integer number (21743046).

Almost surely, 2^72476815 is an apocalyptic number.

72476815 is a deficient number, since it is larger than the sum of its proper divisors (14495369).

72476815 is a wasteful number, since it uses less digits than its factorization.

72476815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14495368.

The product of its digits is 94080, while the sum is 40.

The square root of 72476815 is about 8513.3316040197. The cubic root of 72476815 is about 416.9330921833.

The spelling of 72476815 in words is "seventy-two million, four hundred seventy-six thousand, eight hundred fifteen".