128764190 has 16 divisors (see below), whose sum is σ = 237429360. Its totient is φ = 50249280.

The previous prime is 128764133. The next prime is 128764199. The reversal of 128764190 is 91467821.

It is a super-2 number, since 2×128764190² = 33160433252712200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128764199) 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, 156620 + ... + 157439.

It is an arithmetic number, because the mean of its divisors is an integer number (14839335).

Almost surely, 2^128764190 is an apocalyptic number.

128764190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128764190 is a deficient number, since it is larger than the sum of its proper divisors (108665170).

128764190 is a wasteful number, since it uses less digits than its factorization.

128764190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314107.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 128764190 is about 11347.4309867917. The cubic root of 128764190 is about 504.9693671580.

The spelling of 128764190 in words is "one hundred twenty-eight million, seven hundred sixty-four thousand, one hundred ninety".