191601492 has 96 divisors (see below), whose sum is σ = 495331200. Its totient is φ = 57372672.

The previous prime is 191601439. The next prime is 191601493. The reversal of 191601492 is 294106191.

It is a super-2 number, since 2×191601492² = 73422263473252128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191601493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 822208 + ... + 822440.

It is an arithmetic number, because the mean of its divisors is an integer number (5159700).

Almost surely, 2^191601492 is an apocalyptic number.

191601492 is a gapful number since it is divisible by the number (12) 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 191601492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247665600).

191601492 is an abundant number, since it is smaller than the sum of its proper divisors (303729708).

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

191601492 is a wasteful number, since it uses less digits than its factorization.

191601492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 191601492 is about 13842.0190723752. The cubic root of 191601492 is about 576.5004211141.

The spelling of 191601492 in words is "one hundred ninety-one million, six hundred one thousand, four hundred ninety-two".