138908852 has 24 divisors (see below), whose sum is σ = 245382816. Its totient is φ = 68803488.

The previous prime is 138908851. The next prime is 138908857. The reversal of 138908852 is 258809831.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138908851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313343 + ... + 313785.

It is an arithmetic number, because the mean of its divisors is an integer number (10224284).

Almost surely, 2^138908852 is an apocalyptic number.

It is an amenable number.

138908852 is a deficient number, since it is larger than the sum of its proper divisors (106473964).

138908852 is a wasteful number, since it uses less digits than its factorization.

138908852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 138908852 is about 11785.9599524180. The cubic root of 138908852 is about 517.8968951481.

The spelling of 138908852 in words is "one hundred thirty-eight million, nine hundred eight thousand, eight hundred fifty-two".