138244674 has 32 divisors (see below), whose sum is σ = 290626560. Its totient is φ = 43754832.

The previous prime is 138244657. The next prime is 138244681. The reversal of 138244674 is 476442831.

It is a super-2 number, since 2×138244674² = 38223179778732552, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15579 + ... + 22785.

It is an arithmetic number, because the mean of its divisors is an integer number (9082080).

Almost surely, 2^138244674 is an apocalyptic number.

138244674 is an abundant number, since it is smaller than the sum of its proper divisors (152381886).

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

138244674 is a wasteful number, since it uses less digits than its factorization.

138244674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374.

The product of its digits is 129024, while the sum is 39.

The square root of 138244674 is about 11757.7495295656. The cubic root of 138244674 is about 517.0701529886.

It can be divided in two parts, 1382 and 44674, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 138244674 in words is "one hundred thirty-eight million, two hundred forty-four thousand, six hundred seventy-four".