135880638 has 16 divisors (see below), whose sum is σ = 272004480. Its totient is φ = 45253016.

The previous prime is 135880627. The next prime is 135880639. The reversal of 135880638 is 836088531.

It is a self number, because there is not a number n which added to its sum of digits gives 135880638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135880639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2418 + ... + 16661.

It is an arithmetic number, because the mean of its divisors is an integer number (17000280).

Almost surely, 2^135880638 is an apocalyptic number.

135880638 is an abundant number, since it is smaller than the sum of its proper divisors (136123842).

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

135880638 is a wasteful number, since it uses less digits than its factorization.

135880638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 135880638 is about 11656.7850627864. The cubic root of 135880638 is about 514.1058263935.

The spelling of 135880638 in words is "one hundred thirty-five million, eight hundred eighty thousand, six hundred thirty-eight".