135819780 has 48 divisors (see below), whose sum is σ = 381744384. Its totient is φ = 36080640.

The previous prime is 135819767. The next prime is 135819791. The reversal of 135819780 is 87918531.

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, 12084 + ... + 20436.

It is an arithmetic number, because the mean of its divisors is an integer number (7953008).

Almost surely, 2^135819780 is an apocalyptic number.

135819780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135819780 is an abundant number, since it is smaller than the sum of its proper divisors (245924604).

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

135819780 is a wasteful number, since it uses less digits than its factorization.

135819780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636 (or 8634 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 135819780 is about 11654.1743594302. The cubic root of 135819780 is about 514.0290626373.

The spelling of 135819780 in words is "one hundred thirty-five million, eight hundred nineteen thousand, seven hundred eighty".