138230500 has 24 divisors (see below), whose sum is σ = 301896504. Its totient is φ = 55292000.

The previous prime is 138230497. The next prime is 138230513. The reversal of 138230500 is 5032831.

138230500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 73984 + 138156516 = 272^2 + 11754^2 .

It is a super-2 number, since 2×138230500² = 38215342260500000, which contains 22 as substring.

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, 137731 + ... + 138730.

It is an arithmetic number, because the mean of its divisors is an integer number (12579021).

Almost surely, 2^138230500 is an apocalyptic number.

138230500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138230500 is an abundant number, since it is smaller than the sum of its proper divisors (163666004).

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

138230500 is a wasteful number, since it uses less digits than its factorization.

138230500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276480 (or 276468 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 138230500 is about 11757.1467627142. The cubic root of 138230500 is about 517.0524809326.

The spelling of 138230500 in words is "one hundred thirty-eight million, two hundred thirty thousand, five hundred".