138333344 has 24 divisors (see below), whose sum is σ = 278988948. Its totient is φ = 67479040.

The previous prime is 138333331. The next prime is 138333383. The reversal of 138333344 is 443333831.

It can be written as a sum of positive squares in 2 ways, for example, as 97219600 + 41113744 = 9860^2 + 6412^2 .

It is a super-2 number, since 2×138333344² = 38272228124444672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 138333344.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51407 + ... + 54030.

Almost surely, 2^138333344 is an apocalyptic number.

It is an amenable number.

138333344 is an abundant number, since it is smaller than the sum of its proper divisors (140655604).

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

138333344 is a wasteful number, since it uses less digits than its factorization.

138333344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105488 (or 105480 counting only the distinct ones).

The product of its digits is 31104, while the sum is 32.

The square root of 138333344 is about 11761.5196297077. The cubic root of 138333344 is about 517.1806787933.

The spelling of 138333344 in words is "one hundred thirty-eight million, three hundred thirty-three thousand, three hundred forty-four".