135815880 has 32 divisors (see below), whose sum is σ = 407448000. Its totient is φ = 36217536.

The previous prime is 135815861. The next prime is 135815881. The reversal of 135815880 is 88518531.

It is not an unprimeable number, because it can be changed into a prime (135815881) 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, 565780 + ... + 566019.

It is an arithmetic number, because the mean of its divisors is an integer number (12732750).

Almost surely, 2^135815880 is an apocalyptic number.

135815880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135815880 is an abundant number, since it is smaller than the sum of its proper divisors (271632120).

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

135815880 is a wasteful number, since it uses less digits than its factorization.

135815880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131813 (or 1131809 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 39.

The square root of 135815880 is about 11654.0070362086. The cubic root of 135815880 is about 514.0241425573.

The spelling of 135815880 in words is "one hundred thirty-five million, eight hundred fifteen thousand, eight hundred eighty".