191780946 has 224 divisors, whose sum is σ = 554019840. Its totient is φ = 48498912.

The previous prime is 191780933. The next prime is 191780947. The reversal of 191780946 is 649087191.

It is a happy number.

191780946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (191780947) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4460001 + ... + 4460043.

Almost surely, 2^191780946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191780946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277009920).

191780946 is an abundant number, since it is smaller than the sum of its proper divisors (362238894).

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

191780946 is a wasteful number, since it uses less digits than its factorization.

191780946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 191780946 is about 13848.4997743438. The cubic root of 191780946 is about 576.6803484267.

The spelling of 191780946 in words is "one hundred ninety-one million, seven hundred eighty thousand, nine hundred forty-six".