138853624 has 64 divisors (see below), whose sum is σ = 331531200. Its totient is φ = 53028864.

The previous prime is 138853613. The next prime is 138853697. The reversal of 138853624 is 426358831.

138853624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 17824 + ... + 24400.

It is an arithmetic number, because the mean of its divisors is an integer number (5180175).

Almost surely, 2^138853624 is an apocalyptic number.

138853624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138853624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165765600).

138853624 is an abundant number, since it is smaller than the sum of its proper divisors (192677576).

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

138853624 is a wasteful number, since it uses less digits than its factorization.

138853624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632 (or 6628 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 138853624 is about 11783.6167622679. The cubic root of 138853624 is about 517.8282501319.

The spelling of 138853624 in words is "one hundred thirty-eight million, eight hundred fifty-three thousand, six hundred twenty-four".