128902320 has 160 divisors (see below), whose sum is σ = 449971200. Its totient is φ = 33912576.

The previous prime is 128902283. The next prime is 128902331. The reversal of 128902320 is 23209821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 178921 + ... + 179639.

It is an arithmetic number, because the mean of its divisors is an integer number (2812320).

Almost surely, 2^128902320 is an apocalyptic number.

128902320 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 128902320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224985600).

128902320 is an abundant number, since it is smaller than the sum of its proper divisors (321068880).

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

128902320 is a wasteful number, since it uses less digits than its factorization.

128902320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 128902320 is about 11353.5157550426. The cubic root of 128902320 is about 505.1498689262.

The spelling of 128902320 in words is "one hundred twenty-eight million, nine hundred two thousand, three hundred twenty".