72426815 has 8 divisors (see below), whose sum is σ = 87082128. Its totient is φ = 57828160.

The previous prime is 72426773. The next prime is 72426821. The reversal of 72426815 is 51862427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72426815 - 2¹² = 72422719 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 11297 + ... + 16506.

It is an arithmetic number, because the mean of its divisors is an integer number (10885266).

Almost surely, 2^72426815 is an apocalyptic number.

72426815 is a deficient number, since it is larger than the sum of its proper divisors (14655313).

72426815 is a wasteful number, since it uses less digits than its factorization.

72426815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28329.

The product of its digits is 26880, while the sum is 35.

The square root of 72426815 is about 8510.3945266950. The cubic root of 72426815 is about 416.8371927783.

The spelling of 72426815 in words is "seventy-two million, four hundred twenty-six thousand, eight hundred fifteen".