138271464 has 24 divisors (see below), whose sum is σ = 374485410. Its totient is φ = 46090464.

The previous prime is 138271459. The next prime is 138271477. The reversal of 138271464 is 464172831.

It can be written as a sum of positive squares in only one way, i.e., 137874564 + 396900 = 11742^2 + 630^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 960147 + ... + 960290.

Almost surely, 2^138271464 is an apocalyptic number.

It is an amenable number.

138271464 is an abundant number, since it is smaller than the sum of its proper divisors (236213946).

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

138271464 is a wasteful number, since it uses less digits than its factorization.

138271464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920449 (or 1920442 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 138271464 is about 11758.8887230044. Note that the first 3 decimals coincide. The cubic root of 138271464 is about 517.1035512968.

The spelling of 138271464 in words is "one hundred thirty-eight million, two hundred seventy-one thousand, four hundred sixty-four".