193091928 has 32 divisors (see below), whose sum is σ = 484134000. Its totient is φ = 64176768.

The previous prime is 193091897. The next prime is 193091929. The reversal of 193091928 is 829190391.

It is a self number, because there is not a number n which added to its sum of digits gives 193091928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193091929) 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, 3151 + ... + 19902.

Almost surely, 2^193091928 is an apocalyptic number.

It is an amenable number.

193091928 is an abundant number, since it is smaller than the sum of its proper divisors (291042072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

193091928 is a wasteful number, since it uses less digits than its factorization.

193091928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23411 (or 23407 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 193091928 is about 13895.7521566844. The cubic root of 193091928 is about 577.9913952495.

The spelling of 193091928 in words is "one hundred ninety-three million, ninety-one thousand, nine hundred twenty-eight".