138556752 has 40 divisors (see below), whose sum is σ = 365559936. Its totient is φ = 45202176.

The previous prime is 138556709. The next prime is 138556801. The reversal of 138556752 is 257655831.

It is a congruent number.

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, 28453 + ... + 32964.

Almost surely, 2^138556752 is an apocalyptic number.

138556752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138556752 is an abundant number, since it is smaller than the sum of its proper divisors (227003184).

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

138556752 is a wasteful number, since it uses less digits than its factorization.

138556752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61475 (or 61469 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The square root of 138556752 is about 11771.0132104250. The cubic root of 138556752 is about 517.4589442096.

The spelling of 138556752 in words is "one hundred thirty-eight million, five hundred fifty-six thousand, seven hundred fifty-two".