138255576 has 96 divisors (see below), whose sum is σ = 373455360. Its totient is φ = 42552576.

The previous prime is 138255563. The next prime is 138255581. The reversal of 138255576 is 675552831.

138255576 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138255576² = 38229208590183552, which contains 22 as substring.

Its product of digits (252000) is a multiple of the sum of its prime factors (225).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1893876 + ... + 1893948.

It is an arithmetic number, because the mean of its divisors is an integer number (3890160).

Almost surely, 2^138255576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138255576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186727680).

138255576 is an abundant number, since it is smaller than the sum of its proper divisors (235199784).

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

138255576 is a wasteful number, since it uses less digits than its factorization.

138255576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 148 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The square root of 138255576 is about 11758.2131295533. The cubic root of 138255576 is about 517.0837447132.

It can be divided in two parts, 138255 and 576, that added together give a palindrome (138831).

The spelling of 138255576 in words is "one hundred thirty-eight million, two hundred fifty-five thousand, five hundred seventy-six".