138659274 has 24 divisors (see below), whose sum is σ = 323538852. Its totient is φ = 42664320.

The previous prime is 138659273. The next prime is 138659291. The reversal of 138659274 is 472956831.

It can be written as a sum of positive squares in 2 ways, for example, as 138650625 + 8649 = 11775^2 + 93^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138659273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 296047 + ... + 296514.

Almost surely, 2^138659274 is an apocalyptic number.

138659274 is an abundant number, since it is smaller than the sum of its proper divisors (184879578).

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

138659274 is a wasteful number, since it uses less digits than its factorization.

138659274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592582 (or 592579 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 138659274 is about 11775.3672554193. The cubic root of 138659274 is about 517.5865401727.

The spelling of 138659274 in words is "one hundred thirty-eight million, six hundred fifty-nine thousand, two hundred seventy-four".