128308516 has 24 divisors (see below), whose sum is σ = 262878336. Its totient is φ = 53647680.

The previous prime is 128308507. The next prime is 128308529. The reversal of 128308516 is 615803821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54736 + ... + 57031.

It is an arithmetic number, because the mean of its divisors is an integer number (10953264).

Almost surely, 2^128308516 is an apocalyptic number.

It is an amenable number.

128308516 is an abundant number, since it is smaller than the sum of its proper divisors (134569820).

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

128308516 is a wasteful number, since it uses less digits than its factorization.

128308516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111819 (or 111817 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 128308516 is about 11327.3349027916. The cubic root of 128308516 is about 504.3729969615.

The spelling of 128308516 in words is "one hundred twenty-eight million, three hundred eight thousand, five hundred sixteen".