138920152 has 16 divisors (see below), whose sum is σ = 297686160. Its totient is φ = 59537184.

The previous prime is 138920149. The next prime is 138920167. The reversal of 138920152 is 251029831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240303 + ... + 1240414.

It is an arithmetic number, because the mean of its divisors is an integer number (18605385).

Almost surely, 2^138920152 is an apocalyptic number.

It is an amenable number.

138920152 is an abundant number, since it is smaller than the sum of its proper divisors (158766008).

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

138920152 is a wasteful number, since it uses less digits than its factorization.

138920152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480730 (or 2480726 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 138920152 is about 11786.4393266160. The cubic root of 138920152 is about 517.9109381126.

Adding to 138920152 its reverse (251029831), we get a palindrome (389949983).

The spelling of 138920152 in words is "one hundred thirty-eight million, nine hundred twenty thousand, one hundred fifty-two".