191765140 has 48 divisors (see below), whose sum is σ = 461026944. Its totient is φ = 65635200.

The previous prime is 191765131. The next prime is 191765141. The reversal of 191765140 is 41567191.

191765140 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 = 191765096 and 191765105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191765141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147895 + ... + 149185.

It is an arithmetic number, because the mean of its divisors is an integer number (9604728).

Almost surely, 2^191765140 is an apocalyptic number.

191765140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191765140 is an abundant number, since it is smaller than the sum of its proper divisors (269261804).

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

191765140 is a wasteful number, since it uses less digits than its factorization.

191765140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368 (or 2366 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 191765140 is about 13847.9290870512. The cubic root of 191765140 is about 576.6645052469.

The spelling of 191765140 in words is "one hundred ninety-one million, seven hundred sixty-five thousand, one hundred forty".