138822500 has 30 divisors (see below), whose sum is σ = 303582510. Its totient is φ = 55528000.

The previous prime is 138822499. The next prime is 138822517. The reversal of 138822500 is 5228831.

It can be written as a sum of positive squares in 5 ways, for example, as 102050404 + 36772096 = 10102^2 + 6064^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 25265 + ... + 30264.

It is an arithmetic number, because the mean of its divisors is an integer number (10119417).

Almost surely, 2^138822500 is an apocalyptic number.

138822500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138822500 is an abundant number, since it is smaller than the sum of its proper divisors (164760010).

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

138822500 is an equidigital number, since it uses as much as digits as its factorization.

138822500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55553 (or 55536 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 138822500 is about 11782.2960410949. The cubic root of 138822500 is about 517.7895568894.

The spelling of 138822500 in words is "one hundred thirty-eight million, eight hundred twenty-two thousand, five hundred".