72102140 has 24 divisors (see below), whose sum is σ = 165179952. Its totient is φ = 26218880.

The previous prime is 72102127. The next prime is 72102157. The reversal of 72102140 is 4120127.

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, 163649 + ... + 164088.

It is an arithmetic number, because the mean of its divisors is an integer number (6882498).

Almost surely, 2^72102140 is an apocalyptic number.

It is an amenable number.

72102140 is an abundant number, since it is smaller than the sum of its proper divisors (93077812).

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

72102140 is a wasteful number, since it uses less digits than its factorization.

72102140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327757 (or 327755 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 72102140 is about 8491.2978984370. The cubic root of 72102140 is about 416.2133936612.

Adding to 72102140 its reverse (4120127), we get a palindrome (76222267).

The spelling of 72102140 in words is "seventy-two million, one hundred two thousand, one hundred forty".