138009100 has 36 divisors (see below), whose sum is σ = 300150928. Its totient is φ = 55080000.

The previous prime is 138009097. The next prime is 138009121. The reversal of 138009100 is 1900831.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52825 + ... + 55375.

Almost surely, 2^138009100 is an apocalyptic number.

138009100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138009100 is an abundant number, since it is smaller than the sum of its proper divisors (162141828).

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

138009100 is a wasteful number, since it uses less digits than its factorization.

138009100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106 (or 3099 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 138009100 is about 11747.7274398072. The cubic root of 138009100 is about 516.7762838293.

Adding to 138009100 its reverse (1900831), we get a palindrome (139909931).

The spelling of 138009100 in words is "one hundred thirty-eight million, nine thousand, one hundred".