138669532 has 48 divisors (see below), whose sum is σ = 258552000. Its totient is φ = 64977920.

The previous prime is 138669523. The next prime is 138669547. The reversal of 138669532 is 235966831.

It is a pancake number, because a pancake can be divided into 138669532 parts by 16653 straight cuts.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930594 + ... + 930742.

It is an arithmetic number, because the mean of its divisors is an integer number (5386500).

Almost surely, 2^138669532 is an apocalyptic number.

It is an amenable number.

138669532 is a deficient number, since it is larger than the sum of its proper divisors (119882468).

138669532 is a wasteful number, since it uses less digits than its factorization.

138669532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 364 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 138669532 is about 11775.8028176426. The cubic root of 138669532 is about 517.5993035257.

The spelling of 138669532 in words is "one hundred thirty-eight million, six hundred sixty-nine thousand, five hundred thirty-two".