191245650 has 48 divisors (see below), whose sum is σ = 475948704. Its totient is φ = 50820480.

The previous prime is 191245643. The next prime is 191245651. The reversal of 191245650 is 56542191.

191245650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (191245651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43974 + ... + 48126.

It is an arithmetic number, because the mean of its divisors is an integer number (9915598).

Almost surely, 2^191245650 is an apocalyptic number.

191245650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 191245650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237974352).

191245650 is an abundant number, since it is smaller than the sum of its proper divisors (284703054).

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

191245650 is a wasteful number, since it uses less digits than its factorization.

191245650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475 (or 4470 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 191245650 is about 13829.1594104631. The cubic root of 191245650 is about 576.1433080440.

The spelling of 191245650 in words is "one hundred ninety-one million, two hundred forty-five thousand, six hundred fifty".