135398880 has 144 divisors (see below), whose sum is σ = 489316464. Its totient is φ = 33976320.

The previous prime is 135398843. The next prime is 135398903. The reversal of 135398880 is 88893531.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 21715 + ... + 27245.

It is an arithmetic number, because the mean of its divisors is an integer number (3398031).

Almost surely, 2^135398880 is an apocalyptic number.

135398880 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 135398880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244658232).

135398880 is an abundant number, since it is smaller than the sum of its proper divisors (353917584).

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

135398880 is a wasteful number, since it uses less digits than its factorization.

135398880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569 (or 5558 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 135398880 is about 11636.1024402503. The cubic root of 135398880 is about 513.4975281051.

The spelling of 135398880 in words is "one hundred thirty-five million, three hundred ninety-eight thousand, eight hundred eighty".