128823480 has 128 divisors (see below), whose sum is σ = 434030400. Its totient is φ = 33984000.

The previous prime is 128823479. The next prime is 128823509. The reversal of 128823480 is 84328821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108490 + ... + 109670.

Almost surely, 2^128823480 is an apocalyptic number.

128823480 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 128823480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217015200).

128823480 is an abundant number, since it is smaller than the sum of its proper divisors (305206920).

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

128823480 is a wasteful number, since it uses less digits than its factorization.

128823480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 128823480 is about 11350.0431717241. The cubic root of 128823480 is about 505.0468603380.

The spelling of 128823480 in words is "one hundred twenty-eight million, eight hundred twenty-three thousand, four hundred eighty".