72900015 has 16 divisors (see below), whose sum is σ = 118118400. Its totient is φ = 38387232.

The previous prime is 72900013. The next prime is 72900043. The reversal of 72900015 is 51000927.

It is not a de Polignac number, because 72900015 - 2¹ = 72900013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72900011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29575 + ... + 31944.

It is an arithmetic number, because the mean of its divisors is an integer number (7382400).

Almost surely, 2^72900015 is an apocalyptic number.

72900015 is a deficient number, since it is larger than the sum of its proper divisors (45218385).

72900015 is a wasteful number, since it uses less digits than its factorization.

72900015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61606.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 72900015 is about 8538.1505608650. The cubic root of 72900015 is about 417.7430236769.

The spelling of 72900015 in words is "seventy-two million, nine hundred thousand, fifteen".