138163900 has 72 divisors (see below), whose sum is σ = 353755136. Its totient is φ = 45835200.

The previous prime is 138163889. The next prime is 138163933. The reversal of 138163900 is 9361831.

138163900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18517 + ... + 24883.

Almost surely, 2^138163900 is an apocalyptic number.

138163900 is a gapful number since it is divisible by the number (10) 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 138163900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176877568).

138163900 is an abundant number, since it is smaller than the sum of its proper divisors (215591236).

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

138163900 is a wasteful number, since it uses less digits than its factorization.

138163900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6419 (or 6412 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 138163900 is about 11754.3141016394. The cubic root of 138163900 is about 516.9694282848.

The spelling of 138163900 in words is "one hundred thirty-eight million, one hundred sixty-three thousand, nine hundred".