138887574 has 16 divisors (see below), whose sum is σ = 317457408. Its totient is φ = 39682152.

The previous prime is 138887563. The next prime is 138887579. The reversal of 138887574 is 475788831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138887579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653382 + ... + 1653465.

It is an arithmetic number, because the mean of its divisors is an integer number (19841088).

Almost surely, 2^138887574 is an apocalyptic number.

138887574 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138887574 is an abundant number, since it is smaller than the sum of its proper divisors (178569834).

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

138887574 is a wasteful number, since it uses less digits than its factorization.

138887574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306859.

The product of its digits is 1505280, while the sum is 51.

The square root of 138887574 is about 11785.0572336328. The cubic root of 138887574 is about 517.8704500543.

The spelling of 138887574 in words is "one hundred thirty-eight million, eight hundred eighty-seven thousand, five hundred seventy-four".