191355028 has 12 divisors (see below), whose sum is σ = 334968480. Its totient is φ = 95649752.

The previous prime is 191355007. The next prime is 191355037. The reversal of 191355028 is 820553191.

It is a junction number, because it is equal to n+sod(n) for n = 191354984 and 191355002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21675 + ... + 29197.

It is an arithmetic number, because the mean of its divisors is an integer number (27914040).

Almost surely, 2^191355028 is an apocalyptic number.

It is an amenable number.

191355028 is a deficient number, since it is larger than the sum of its proper divisors (143613452).

191355028 is a wasteful number, since it uses less digits than its factorization.

191355028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13886 (or 13884 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 191355028 is about 13833.1134601000. The cubic root of 191355028 is about 576.2531238626.

The spelling of 191355028 in words is "one hundred ninety-one million, three hundred fifty-five thousand, twenty-eight".