191194840 has 16 divisors (see below), whose sum is σ = 430188480. Its totient is φ = 76477920.

The previous prime is 191194831. The next prime is 191194847. The reversal of 191194840 is 48491191.

It is a self number, because there is not a number n which added to its sum of digits gives 191194840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191194847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2389896 + ... + 2389975.

It is an arithmetic number, because the mean of its divisors is an integer number (26886780).

Almost surely, 2^191194840 is an apocalyptic number.

191194840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191194840 is an abundant number, since it is smaller than the sum of its proper divisors (238993640).

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

191194840 is a wasteful number, since it uses less digits than its factorization.

191194840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779882 (or 4779878 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 191194840 is about 13827.3222281105. The cubic root of 191194840 is about 576.0922804182.

The spelling of 191194840 in words is "one hundred ninety-one million, one hundred ninety-four thousand, eight hundred forty".