191976140 has 12 divisors (see below), whose sum is σ = 403149936. Its totient is φ = 76790448.

The previous prime is 191976139. The next prime is 191976181. The reversal of 191976140 is 41679191.

191976140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 191976094 and 191976103.

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, 4799384 + ... + 4799423.

It is an arithmetic number, because the mean of its divisors is an integer number (33595828).

Almost surely, 2^191976140 is an apocalyptic number.

191976140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191976140 is an abundant number, since it is smaller than the sum of its proper divisors (211173796).

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

191976140 is a wasteful number, since it uses less digits than its factorization.

191976140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9598816 (or 9598814 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 191976140 is about 13855.5454602120. The cubic root of 191976140 is about 576.8759298589.

The spelling of 191976140 in words is "one hundred ninety-one million, nine hundred seventy-six thousand, one hundred forty".