72139088 has 40 divisors (see below), whose sum is σ = 162370560. Its totient is φ = 30407040.

The previous prime is 72139069. The next prime is 72139091. The reversal of 72139088 is 88093127.

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, 1553 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (4059264).

Almost surely, 2^72139088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72139088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81185280).

72139088 is an abundant number, since it is smaller than the sum of its proper divisors (90231472).

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

72139088 is a wasteful number, since it uses less digits than its factorization.

72139088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10635 (or 10629 counting only the distinct ones).

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

The square root of 72139088 is about 8493.4732589206. The cubic root of 72139088 is about 416.2844762782.

The spelling of 72139088 in words is "seventy-two million, one hundred thirty-nine thousand, eighty-eight".