972240915 has 16 divisors (see below), whose sum is σ = 1561207968. Its totient is φ = 516654336.

The previous prime is 972240911. The next prime is 972240917. The reversal of 972240915 is 519042279.

It is not a de Polignac number, because 972240915 - 2² = 972240911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (972240911) 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, 112842 + ... + 121151.

It is an arithmetic number, because the mean of its divisors is an integer number (97575498).

Almost surely, 2^972240915 is an apocalyptic number.

972240915 is a deficient number, since it is larger than the sum of its proper divisors (588967053).

972240915 is a wasteful number, since it uses less digits than its factorization.

972240915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234278.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 972240915 is about 31180.7779729756. Note that the first 3 decimals coincide. The cubic root of 972240915 is about 990.6600078053.

The spelling of 972240915 in words is "nine hundred seventy-two million, two hundred forty thousand, nine hundred fifteen".