138957652 has 12 divisors (see below), whose sum is σ = 243262656. Its totient is φ = 69454040.

The previous prime is 138957649. The next prime is 138957653. The reversal of 138957652 is 256759831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138957653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13077 + ... + 21187.

It is an arithmetic number, because the mean of its divisors is an integer number (20271888).

Almost surely, 2^138957652 is an apocalyptic number.

It is an amenable number.

138957652 is a deficient number, since it is larger than the sum of its proper divisors (104305004).

138957652 is a wasteful number, since it uses less digits than its factorization.

138957652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398 (or 12396 counting only the distinct ones).

The product of its digits is 453600, while the sum is 46.

The square root of 138957652 is about 11788.0300305013. The cubic root of 138957652 is about 517.9575354147.

The spelling of 138957652 in words is "one hundred thirty-eight million, nine hundred fifty-seven thousand, six hundred fifty-two".