191493628 has 24 divisors (see below), whose sum is σ = 355308800. Its totient is φ = 90049968.

The previous prime is 191493619. The next prime is 191493629. The reversal of 191493628 is 826394191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191493629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501 + ... + 19627.

Almost surely, 2^191493628 is an apocalyptic number.

It is an amenable number.

191493628 is a deficient number, since it is larger than the sum of its proper divisors (163815172).

191493628 is a wasteful number, since it uses less digits than its factorization.

191493628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18289 (or 18287 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 191493628 is about 13838.1222714644. The cubic root of 191493628 is about 576.3922185572.

The spelling of 191493628 in words is "one hundred ninety-one million, four hundred ninety-three thousand, six hundred twenty-eight".