72308918 has 16 divisors (see below), whose sum is σ = 123469056. Its totient is φ = 31438440.

The previous prime is 72308893. The next prime is 72308921. The reversal of 72308918 is 81980327.

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, 70946 + ... + 71957.

It is an arithmetic number, because the mean of its divisors is an integer number (7716816).

Almost surely, 2^72308918 is an apocalyptic number.

72308918 is a deficient number, since it is larger than the sum of its proper divisors (51160138).

72308918 is a wasteful number, since it uses less digits than its factorization.

72308918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142939.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 72308918 is about 8503.4650584335. The cubic root of 72308918 is about 416.6108928724.

The spelling of 72308918 in words is "seventy-two million, three hundred eight thousand, nine hundred eighteen".