128919330 has 64 divisors (see below), whose sum is σ = 364020480. Its totient is φ = 32355072.

The previous prime is 128919319. The next prime is 128919337. The reversal of 128919330 is 33919821.

It is not an unprimeable number, because it can be changed into a prime (128919337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9454 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (5687820).

Almost surely, 2^128919330 is an apocalyptic number.

128919330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128919330 is an abundant number, since it is smaller than the sum of its proper divisors (235101150).

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

128919330 is a wasteful number, since it uses less digits than its factorization.

128919330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28120 (or 28114 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 128919330 is about 11354.2648374961. The cubic root of 128919330 is about 505.1720878729.

The spelling of 128919330 in words is "one hundred twenty-eight million, nine hundred nineteen thousand, three hundred thirty".