191192040 has 96 divisors (see below), whose sum is σ = 669188520. Its totient is φ = 47061504.

The previous prime is 191192021. The next prime is 191192051. The reversal of 191192040 is 40291191.

191192040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 174398436 + 16793604 = 13206^2 + 4098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 191191995 and 191192013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15747 + ... + 25106.

Almost surely, 2^191192040 is an apocalyptic number.

191192040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191192040 is an abundant number, since it is smaller than the sum of its proper divisors (477996480).

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

191192040 is a wasteful number, since it uses less digits than its factorization.

191192040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40883 (or 40876 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 191192040 is about 13827.2209789241. The cubic root of 191192040 is about 576.0894681627.

The spelling of 191192040 in words is "one hundred ninety-one million, one hundred ninety-two thousand, forty".