128880394 has 8 divisors (see below), whose sum is σ = 193376160. Its totient is φ = 64421676.

The previous prime is 128880391. The next prime is 128880419. The reversal of 128880394 is 493088821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×128880394² = 33220311915190472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128880394.

It is not an unprimeable number, because it can be changed into a prime (128880391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2347 + ... + 16225.

It is an arithmetic number, because the mean of its divisors is an integer number (24172020).

Almost surely, 2^128880394 is an apocalyptic number.

128880394 is a deficient number, since it is larger than the sum of its proper divisors (64495766).

128880394 is a wasteful number, since it uses less digits than its factorization.

128880394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18524.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 128880394 is about 11352.5501099973. The cubic root of 128880394 is about 505.1212256763.

The spelling of 128880394 in words is "one hundred twenty-eight million, eight hundred eighty thousand, three hundred ninety-four".