72139040 has 48 divisors (see below), whose sum is σ = 177847488. Its totient is φ = 27599616.

The previous prime is 72139019. The next prime is 72139057. The reversal of 72139040 is 4093127.

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, 6122 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (3705156).

Almost surely, 2^72139040 is an apocalyptic number.

It is an amenable number.

72139040 is an abundant number, since it is smaller than the sum of its proper divisors (105708448).

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

72139040 is a wasteful number, since it uses less digits than its factorization.

72139040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19641 (or 19633 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 72139040 is about 8493.4704332210. The cubic root of 72139040 is about 416.2843839489.

The spelling of 72139040 in words is "seventy-two million, one hundred thirty-nine thousand, forty".