138571902 has 72 divisors (see below), whose sum is σ = 367684200. Its totient is φ = 37503648.

The previous prime is 138571897. The next prime is 138571957. The reversal of 138571902 is 209175831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12624 + ... + 20892.

It is an arithmetic number, because the mean of its divisors is an integer number (5106725).

Almost surely, 2^138571902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138571902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183842100).

138571902 is an abundant number, since it is smaller than the sum of its proper divisors (229112298).

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

138571902 is a wasteful number, since it uses less digits than its factorization.

138571902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310 (or 8300 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 138571902 is about 11771.6567228237. The cubic root of 138571902 is about 517.4778034308.

The spelling of 138571902 in words is "one hundred thirty-eight million, five hundred seventy-one thousand, nine hundred two".