138174885 has 12 divisors (see below), whose sum is σ = 239503212. Its totient is φ = 73693248.

The previous prime is 138174863. The next prime is 138174893. The reversal of 138174885 is 588471831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77475204 + 60699681 = 8802^2 + 7791^2 .

It is not a de Polignac number, because 138174885 - 2⁹ = 138174373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3070553 = 138174885 / (1 + 3 + 8 + 1 + 7 + 4 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 138174885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1535232 + ... + 1535321.

It is an arithmetic number, because the mean of its divisors is an integer number (19958601).

Almost surely, 2^138174885 is an apocalyptic number.

138174885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138174885 is a deficient number, since it is larger than the sum of its proper divisors (101328327).

138174885 is a wasteful number, since it uses less digits than its factorization.

138174885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070564 (or 3070561 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 138174885 is about 11754.7813675968. The cubic root of 138174885 is about 516.9831288213.

The spelling of 138174885 in words is "one hundred thirty-eight million, one hundred seventy-four thousand, eight hundred eighty-five".