128913516 has 36 divisors (see below), whose sum is σ = 345034872. Its totient is φ = 40443264.

The previous prime is 128913481. The next prime is 128913517. The reversal of 128913516 is 615319821.

128913516 is a `hidden beast` number, since 128 + 9 + 13 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (128913517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104710 + ... + 105933.

It is an arithmetic number, because the mean of its divisors is an integer number (9584302).

Almost surely, 2^128913516 is an apocalyptic number.

It is an amenable number.

128913516 is an abundant number, since it is smaller than the sum of its proper divisors (216121356).

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

128913516 is a wasteful number, since it uses less digits than its factorization.

128913516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210670 (or 210665 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 128913516 is about 11354.0088074653. The cubic root of 128913516 is about 505.1644936803.

The spelling of 128913516 in words is "one hundred twenty-eight million, nine hundred thirteen thousand, five hundred sixteen".