72800138 has 16 divisors (see below), whose sum is σ = 110473440. Its totient is φ = 35978256.

The previous prime is 72800113. The next prime is 72800141. The reversal of 72800138 is 83100827.

It is a self number, because there is not a number n which added to its sum of digits gives 72800138.

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, 84920 + ... + 85772.

It is an arithmetic number, because the mean of its divisors is an integer number (6904590).

Almost surely, 2^72800138 is an apocalyptic number.

72800138 is a deficient number, since it is larger than the sum of its proper divisors (37673302).

72800138 is a wasteful number, since it uses less digits than its factorization.

72800138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 72800138 is about 8532.2996900015. The cubic root of 72800138 is about 417.5521595703.

The spelling of 72800138 in words is "seventy-two million, eight hundred thousand, one hundred thirty-eight".