138453156 has 18 divisors (see below), whose sum is σ = 349978902. Its totient is φ = 46151040.

The previous prime is 138453143. The next prime is 138453173. The reversal of 138453156 is 651354831.

It can be written as a sum of positive squares in only one way, i.e., 138438756 + 14400 = 11766^2 + 120^2 .

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

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: 3845921 = 138453156 / (1 + 3 + 8 + 4 + 5 + 3 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 138453156.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1922925 + ... + 1922996.

Almost surely, 2^138453156 is an apocalyptic number.

It is an amenable number.

138453156 is an abundant number, since it is smaller than the sum of its proper divisors (211525746).

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

138453156 is a wasteful number, since it uses less digits than its factorization.

138453156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845931 (or 3845926 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 138453156 is about 11766.6119167754. The cubic root of 138453156 is about 517.3299476270.

Subtracting from 138453156 its sum of digits (36), we obtain a triangular number (138453120 = T₁₆₆₄₀).

The spelling of 138453156 in words is "one hundred thirty-eight million, four hundred fifty-three thousand, one hundred fifty-six".