72040915 has 8 divisors (see below), whose sum is σ = 86533200. Its totient is φ = 57576672.

The previous prime is 72040907. The next prime is 72040933. The reversal of 72040915 is 51904027.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72040915 - 2³ = 72040907 is a prime.

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, 865 + ... + 12034.

It is an arithmetic number, because the mean of its divisors is an integer number (10816650).

Almost surely, 2^72040915 is an apocalyptic number.

72040915 is a deficient number, since it is larger than the sum of its proper divisors (14492285).

72040915 is a wasteful number, since it uses less digits than its factorization.

72040915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14021.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 72040915 is about 8487.6919713194. The cubic root of 72040915 is about 416.0955521231.

The spelling of 72040915 in words is "seventy-two million, forty thousand, nine hundred fifteen".