138192100 has 18 divisors (see below), whose sum is σ = 299877074. Its totient is φ = 55276800.

The previous prime is 138192097. The next prime is 138192121. The reversal of 138192100 is 1291831.

It can be written as a sum of positive squares in 3 ways, for example, as 45724644 + 92467456 = 6762^2 + 9616^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 690861 + ... + 691060.

Almost surely, 2^138192100 is an apocalyptic number.

138192100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138192100 is an abundant number, since it is smaller than the sum of its proper divisors (161684974).

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

138192100 is a wasteful number, since it uses less digits than its factorization.

138192100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381935 (or 1381928 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 138192100 is about 11755.5136000091. The cubic root of 138192100 is about 517.0045979785.

The spelling of 138192100 in words is "one hundred thirty-eight million, one hundred ninety-two thousand, one hundred".