138274944 has 32 divisors (see below), whose sum is σ = 367293840. Its totient is φ = 46091520.

The previous prime is 138274943. The next prime is 138274967. The reversal of 138274944 is 449472831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 138274896 and 138274905.

It is not an unprimeable number, because it can be changed into a prime (138274943) 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 3 ways as a sum of consecutive naturals, for example, 179662 + ... + 180429.

Almost surely, 2^138274944 is an apocalyptic number.

It is an amenable number.

138274944 is an abundant number, since it is smaller than the sum of its proper divisors (229018896).

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

138274944 is an equidigital number, since it uses as much as digits as its factorization.

138274944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360108 (or 360096 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 138274944 is about 11759.0366952400. The cubic root of 138274944 is about 517.1078893943.

The spelling of 138274944 in words is "one hundred thirty-eight million, two hundred seventy-four thousand, nine hundred forty-four".