128898960 has 40 divisors (see below), whose sum is σ = 399587520. Its totient is φ = 34372992.

The previous prime is 128898953. The next prime is 128898971. The reversal of 128898960 is 69898821.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×128898960² = 33229883778163200, which contains 22 as substring.

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, 268300 + ... + 268779.

It is an arithmetic number, because the mean of its divisors is an integer number (9989688).

Almost surely, 2^128898960 is an apocalyptic number.

128898960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128898960 is an abundant number, since it is smaller than the sum of its proper divisors (270688560).

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

128898960 is a wasteful number, since it uses less digits than its factorization.

128898960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537095 (or 537089 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 128898960 is about 11353.3677822926. The cubic root of 128898960 is about 505.1454797672.

The spelling of 128898960 in words is "one hundred twenty-eight million, eight hundred ninety-eight thousand, nine hundred sixty".