128365320 has 64 divisors (see below), whose sum is σ = 394067520. Its totient is φ = 33433344.

The previous prime is 128365309. The next prime is 128365337. The reversal of 128365320 is 23563821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7279 + ... + 17598.

It is an arithmetic number, because the mean of its divisors is an integer number (6157305).

Almost surely, 2^128365320 is an apocalyptic number.

128365320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128365320 is an abundant number, since it is smaller than the sum of its proper divisors (265702200).

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

128365320 is a wasteful number, since it uses less digits than its factorization.

128365320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24934 (or 24930 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 128365320 is about 11329.8420112551. The cubic root of 128365320 is about 504.4474170069.

The spelling of 128365320 in words is "one hundred twenty-eight million, three hundred sixty-five thousand, three hundred twenty".