191900112 has 20 divisors (see below), whose sum is σ = 495742080. Its totient is φ = 63966688.

The previous prime is 191900053. The next prime is 191900117. The reversal of 191900112 is 211009191.

It is a super-2 number, since 2×191900112² = 73651305971225088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191900117) 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, 1998912 + ... + 1999007.

It is an arithmetic number, because the mean of its divisors is an integer number (24787104).

Almost surely, 2^191900112 is an apocalyptic number.

191900112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191900112 is an abundant number, since it is smaller than the sum of its proper divisors (303841968).

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

191900112 is a wasteful number, since it uses less digits than its factorization.

191900112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997930 (or 3997924 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 191900112 is about 13852.8015939015. The cubic root of 191900112 is about 576.7997667234.

The spelling of 191900112 in words is "one hundred ninety-one million, nine hundred thousand, one hundred twelve".