128960988 has 24 divisors (see below), whose sum is σ = 324056208. Its totient is φ = 39680256.

The previous prime is 128960987. The next prime is 128961011. The reversal of 128960988 is 889069821.

It is a super-2 number, since 2×128960988² = 33261872851872288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128960988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128960983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413181 + ... + 413492.

It is an arithmetic number, because the mean of its divisors is an integer number (13502342).

Almost surely, 2^128960988 is an apocalyptic number.

It is an amenable number.

128960988 is an abundant number, since it is smaller than the sum of its proper divisors (195095220).

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

128960988 is a wasteful number, since it uses less digits than its factorization.

128960988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826693 (or 826691 counting only the distinct ones).

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

The square root of 128960988 is about 11356.0991541990. The cubic root of 128960988 is about 505.2264944865.

The spelling of 128960988 in words is "one hundred twenty-eight million, nine hundred sixty thousand, nine hundred eighty-eight".