138088902 has 32 divisors (see below), whose sum is σ = 323334144. Its totient is φ = 38491200.

The previous prime is 138088901. The next prime is 138088931. The reversal of 138088902 is 209880831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138088901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38374 + ... + 41817.

It is an arithmetic number, because the mean of its divisors is an integer number (10104192).

Almost surely, 2^138088902 is an apocalyptic number.

138088902 is an abundant number, since it is smaller than the sum of its proper divisors (185245242).

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

138088902 is a wasteful number, since it uses less digits than its factorization.

138088902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80244.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 138088902 is about 11751.1234356550. The cubic root of 138088902 is about 516.8758710660.

The spelling of 138088902 in words is "one hundred thirty-eight million, eighty-eight thousand, nine hundred two".