135405780 has 96 divisors (see below), whose sum is σ = 408965760. Its totient is φ = 33361920.

The previous prime is 135405773. The next prime is 135405791. The reversal of 135405780 is 87504531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45292 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (4260060).

Almost surely, 2^135405780 is an apocalyptic number.

135405780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135405780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204482880).

135405780 is an abundant number, since it is smaller than the sum of its proper divisors (273559980).

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

135405780 is a wasteful number, since it uses less digits than its factorization.

135405780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969 (or 2967 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 135405780 is about 11636.3989275033. The cubic root of 135405780 is about 513.5062506607.

The spelling of 135405780 in words is "one hundred thirty-five million, four hundred five thousand, seven hundred eighty".