191340928 has 32 divisors (see below), whose sum is σ = 393491520. Its totient is φ = 92582400.

The previous prime is 191340911. The next prime is 191340943. The reversal of 191340928 is 829043191.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×191340928² = 73222701455802368, which contains 22 as substring.

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, 20143 + ... + 28078.

It is an arithmetic number, because the mean of its divisors is an integer number (12296610).

Almost surely, 2^191340928 is an apocalyptic number.

It is an amenable number.

191340928 is an abundant number, since it is smaller than the sum of its proper divisors (202150592).

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

191340928 is an equidigital number, since it uses as much as digits as its factorization.

191340928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48266 (or 48254 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 191340928 is about 13832.6038040566. The cubic root of 191340928 is about 576.2389697730.

The spelling of 191340928 in words is "one hundred ninety-one million, three hundred forty thousand, nine hundred twenty-eight".