138574782 has 24 divisors (see below), whose sum is σ = 303344496. Its totient is φ = 45714816.

The previous prime is 138574729. The next prime is 138574873. The reversal of 138574782 is 287475831.

138574782 is a `hidden beast` number, since 1 + 3 + 8 + 574 + 78 + 2 = 666.

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, 37938 + ... + 41429.

It is an arithmetic number, because the mean of its divisors is an integer number (12639354).

Almost surely, 2^138574782 is an apocalyptic number.

138574782 is an abundant number, since it is smaller than the sum of its proper divisors (164769714).

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

138574782 is a wasteful number, since it uses less digits than its factorization.

138574782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79472 (or 79469 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 138574782 is about 11771.7790499142. The cubic root of 138574782 is about 517.4813883946.

It can be divided in two parts, 13857478 and 2, that added together give a triangular number (13857480 = T₅₂₆₄).

The spelling of 138574782 in words is "one hundred thirty-eight million, five hundred seventy-four thousand, seven hundred eighty-two".