191028190 has 8 divisors (see below), whose sum is σ = 343850760. Its totient is φ = 76411272.

The previous prime is 191028181. The next prime is 191028197. The reversal of 191028190 is 91820191.

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

It is a super-2 number, since 2×191028190² = 72983538749352200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191028197) 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, 9551400 + ... + 9551419.

It is an arithmetic number, because the mean of its divisors is an integer number (42981345).

Almost surely, 2^191028190 is an apocalyptic number.

191028190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191028190 is a deficient number, since it is larger than the sum of its proper divisors (152822570).

191028190 is a wasteful number, since it uses less digits than its factorization.

191028190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19102826.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 191028190 is about 13821.2948018628. The cubic root of 191028190 is about 575.9248531563.

The spelling of 191028190 in words is "one hundred ninety-one million, twenty-eight thousand, one hundred ninety".