138785582 has 16 divisors (see below), whose sum is σ = 227994480. Its totient is φ = 62968512.

The previous prime is 138785579. The next prime is 138785623. The reversal of 138785582 is 285587831.

It is a super-2 number, since 2×138785582² = 38522875542157448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43703 + ... + 46770.

It is an arithmetic number, because the mean of its divisors is an integer number (14249655).

Almost surely, 2^138785582 is an apocalyptic number.

138785582 is a deficient number, since it is larger than the sum of its proper divisors (89208898).

138785582 is a wasteful number, since it uses less digits than its factorization.

138785582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90547.

The product of its digits is 537600, while the sum is 47.

The square root of 138785582 is about 11780.7292643537. The cubic root of 138785582 is about 517.7436530683.

The spelling of 138785582 in words is "one hundred thirty-eight million, seven hundred eighty-five thousand, five hundred eighty-two".