72538815 has 8 divisors (see below), whose sum is σ = 116062128. Its totient is φ = 38687360.

The previous prime is 72538787. The next prime is 72538901. The reversal of 72538815 is 51883527.

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

It is not a de Polignac number, because 72538815 - 2⁸ = 72538559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2417946 + ... + 2417975.

It is an arithmetic number, because the mean of its divisors is an integer number (14507766).

Almost surely, 2^72538815 is an apocalyptic number.

72538815 is a deficient number, since it is larger than the sum of its proper divisors (43523313).

72538815 is a wasteful number, since it uses less digits than its factorization.

72538815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835929.

The product of its digits is 67200, while the sum is 39.

The square root of 72538815 is about 8516.9721732550. The cubic root of 72538815 is about 417.0519462112.

The spelling of 72538815 in words is "seventy-two million, five hundred thirty-eight thousand, eight hundred fifteen".