138494574 has 12 divisors (see below), whose sum is σ = 300071616. Its totient is φ = 46164852.

The previous prime is 138494539. The next prime is 138494579. The reversal of 138494574 is 475494831.

138494574 is a `hidden beast` number, since 1 + 38 + 49 + 4 + 574 = 666.

138494574 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138494579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3847054 + ... + 3847089.

It is an arithmetic number, because the mean of its divisors is an integer number (25005968).

Almost surely, 2^138494574 is an apocalyptic number.

138494574 is an abundant number, since it is smaller than the sum of its proper divisors (161577042).

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

138494574 is a wasteful number, since it uses less digits than its factorization.

138494574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7694151 (or 7694148 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 138494574 is about 11768.3717650319. The cubic root of 138494574 is about 517.3815285760.

The spelling of 138494574 in words is "one hundred thirty-eight million, four hundred ninety-four thousand, five hundred seventy-four".