128422320 has 80 divisors (see below), whose sum is σ = 428743392. Its totient is φ = 31610880.

The previous prime is 128422309. The next prime is 128422351. The reversal of 128422320 is 23224821.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 17461 + ... + 23700.

Almost surely, 2^128422320 is an apocalyptic number.

128422320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128422320 is an abundant number, since it is smaller than the sum of its proper divisors (300321072).

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

128422320 is a wasteful number, since it uses less digits than its factorization.

128422320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41190 (or 41184 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 128422320 is about 11332.3572128662. The cubic root of 128422320 is about 504.5220717705.

The spelling of 128422320 in words is "one hundred twenty-eight million, four hundred twenty-two thousand, three hundred twenty".