138558885 has 16 divisors (see below), whose sum is σ = 227102400. Its totient is φ = 72095360.

The previous prime is 138558863. The next prime is 138558899. The reversal of 138558885 is 588855831.

It is not a de Polignac number, because 138558885 - 2¹² = 138554789 is a prime.

It is a super-2 number, since 2×138558885² = 38397129224886450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112035 + ... + 113264.

It is an arithmetic number, because the mean of its divisors is an integer number (14193900).

Almost surely, 2^138558885 is an apocalyptic number.

138558885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138558885 is a deficient number, since it is larger than the sum of its proper divisors (88543515).

138558885 is a wasteful number, since it uses less digits than its factorization.

138558885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225348.

The product of its digits is 1536000, while the sum is 51.

The square root of 138558885 is about 11771.1038140015. The cubic root of 138558885 is about 517.4615995217.

The spelling of 138558885 in words is "one hundred thirty-eight million, five hundred fifty-eight thousand, eight hundred eighty-five".