128919190 has 16 divisors (see below), whose sum is σ = 232306560. Its totient is φ = 51511680.

The previous prime is 128919187. The next prime is 128919191. The reversal of 128919190 is 91919821.

It is a super-2 number, since 2×128919190² = 33240315100512200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128919191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406 + ... + 16414.

It is an arithmetic number, because the mean of its divisors is an integer number (14519160).

Almost surely, 2^128919190 is an apocalyptic number.

128919190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128919190 is a deficient number, since it is larger than the sum of its proper divisors (103387370).

128919190 is a wasteful number, since it uses less digits than its factorization.

128919190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14007.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 128919190 is about 11354.2586724101. The cubic root of 128919190 is about 505.1719050089.

The spelling of 128919190 in words is "one hundred twenty-eight million, nine hundred nineteen thousand, one hundred ninety".