191090240 has 56 divisors (see below), whose sum is σ = 496409472. Its totient is φ = 69486080.

The previous prime is 191090227. The next prime is 191090243. The reversal of 191090240 is 42090191.

It is not an unprimeable number, because it can be changed into a prime (191090243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23624 + ... + 30663.

Almost surely, 2^191090240 is an apocalyptic number.

191090240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191090240 is an abundant number, since it is smaller than the sum of its proper divisors (305319232).

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

191090240 is a wasteful number, since it uses less digits than its factorization.

191090240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54315 (or 54305 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 191090240 is about 13823.5393441767. The cubic root of 191090240 is about 575.9872039338.

The spelling of 191090240 in words is "one hundred ninety-one million, ninety thousand, two hundred forty".