72089918 has 4 divisors (see below), whose sum is σ = 108134880. Its totient is φ = 36044958.

The previous prime is 72089893. The next prime is 72089929. The reversal of 72089918 is 81998027.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18022478 + ... + 18022481.

It is an arithmetic number, because the mean of its divisors is an integer number (27033720).

Almost surely, 2^72089918 is an apocalyptic number.

72089918 is a deficient number, since it is larger than the sum of its proper divisors (36044962).

72089918 is a wasteful number, since it uses less digits than its factorization.

72089918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36044961.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 72089918 is about 8490.5781899703. The cubic root of 72089918 is about 416.1898749531.

The spelling of 72089918 in words is "seventy-two million, eighty-nine thousand, nine hundred eighteen".