128925984 has 96 divisors (see below), whose sum is σ = 372617280. Its totient is φ = 39029760.

The previous prime is 128925949. The next prime is 128926009. The reversal of 128925984 is 489529821.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127272 + ... + 128280.

It is an arithmetic number, because the mean of its divisors is an integer number (3881430).

Almost surely, 2^128925984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128925984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186308640).

128925984 is an abundant number, since it is smaller than the sum of its proper divisors (243691296).

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

128925984 is a wasteful number, since it uses less digits than its factorization.

128925984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055 (or 1025 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 128925984 is about 11354.5578513652. The cubic root of 128925984 is about 505.1807789855.

The spelling of 128925984 in words is "one hundred twenty-eight million, nine hundred twenty-five thousand, nine hundred eighty-four".