72139758 has 16 divisors (see below), whose sum is σ = 145681536. Its totient is φ = 23812920.

The previous prime is 72139747. The next prime is 72139777. The reversal of 72139758 is 85793127.

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, 57748 + ... + 58983.

It is an arithmetic number, because the mean of its divisors is an integer number (9105096).

Almost surely, 2^72139758 is an apocalyptic number.

72139758 is an abundant number, since it is smaller than the sum of its proper divisors (73541778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72139758 is a wasteful number, since it uses less digits than its factorization.

72139758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116839.

The product of its digits is 105840, while the sum is 42.

The square root of 72139758 is about 8493.5127008794. The cubic root of 72139758 is about 416.2857650374.

The spelling of 72139758 in words is "seventy-two million, one hundred thirty-nine thousand, seven hundred fifty-eight".