72238918 has 16 divisors (see below), whose sum is σ = 109519776. Its totient is φ = 35734720.

The previous prime is 72238889. The next prime is 72238919. The reversal of 72238918 is 81983227.

It is a super-2 number, since 2×72238918² = 10436922547621448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72238919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96855 + ... + 97597.

It is an arithmetic number, because the mean of its divisors is an integer number (6844986).

Almost surely, 2^72238918 is an apocalyptic number.

72238918 is a deficient number, since it is larger than the sum of its proper divisors (37280858).

72238918 is a wasteful number, since it uses less digits than its factorization.

72238918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its digits is 48384, while the sum is 40.

The square root of 72238918 is about 8499.3480926480. The cubic root of 72238918 is about 416.4764134799.

The spelling of 72238918 in words is "seventy-two million, two hundred thirty-eight thousand, nine hundred eighteen".