138825108 has 18 divisors (see below), whose sum is σ = 350919114. Its totient is φ = 46275024.

The previous prime is 138825107. The next prime is 138825119. The reversal of 138825108 is 801528831.

138825108 is a `hidden beast` number, since 138 + 8 + 2 + 510 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74857104 + 63968004 = 8652^2 + 7998^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×138825108² = 38544821222423328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3856253 = 138825108 / (1 + 3 + 8 + 8 + 2 + 5 + 1 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138825107) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1928091 + ... + 1928162.

Almost surely, 2^138825108 is an apocalyptic number.

138825108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138825108 is an abundant number, since it is smaller than the sum of its proper divisors (212094006).

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

138825108 is a wasteful number, since it uses less digits than its factorization.

138825108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856263 (or 3856258 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 138825108 is about 11782.4067150986. The cubic root of 138825108 is about 517.7927993674.

The spelling of 138825108 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, one hundred eight".