72108815 has 16 divisors (see below), whose sum is σ = 91977120. Its totient is φ = 54082560.

The previous prime is 72108811. The next prime is 72108833. The reversal of 72108815 is 51880127.

It is a happy number.

It is not a de Polignac number, because 72108815 - 2² = 72108811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72108811) 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, 22376 + ... + 25394.

It is an arithmetic number, because the mean of its divisors is an integer number (5748570).

Almost surely, 2^72108815 is an apocalyptic number.

72108815 is a deficient number, since it is larger than the sum of its proper divisors (19868305).

72108815 is a wasteful number, since it uses less digits than its factorization.

72108815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 72108815 is about 8491.6909387942. The cubic root of 72108815 is about 416.2262371943.

The spelling of 72108815 in words is "seventy-two million, one hundred eight thousand, eight hundred fifteen".