128458880 has 128 divisors (see below), whose sum is σ = 341055360. Its totient is φ = 45875200.

The previous prime is 128458879. The next prime is 128458921. The reversal of 128458880 is 88854821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 499712 + ... + 499968.

It is an arithmetic number, because the mean of its divisors is an integer number (2664495).

Almost surely, 2^128458880 is an apocalyptic number.

128458880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128458880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170527680).

128458880 is an abundant number, since it is smaller than the sum of its proper divisors (212596480).

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

128458880 is a wasteful number, since it uses less digits than its factorization.

128458880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 44.

The square root of 128458880 is about 11333.9701781856. The cubic root of 128458880 is about 504.5699439702.

The spelling of 128458880 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, eight hundred eighty".