191869056 has 96 divisors (see below), whose sum is σ = 556283520. Its totient is φ = 63475200.

The previous prime is 191869037. The next prime is 191869061. The reversal of 191869056 is 650968191.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×191869056² = 73627469300662272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 173401 + ... + 174503.

It is an arithmetic number, because the mean of its divisors is an integer number (5794620).

Almost surely, 2^191869056 is an apocalyptic number.

191869056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191869056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278141760).

191869056 is an abundant number, since it is smaller than the sum of its proper divisors (364414464).

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

191869056 is a wasteful number, since it uses less digits than its factorization.

191869056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 191869056 is about 13851.6806200547. The cubic root of 191869056 is about 576.7686497363.

The spelling of 191869056 in words is "one hundred ninety-one million, eight hundred sixty-nine thousand, fifty-six".