191442984 has 96 divisors (see below), whose sum is σ = 530349120. Its totient is φ = 57384448.

The previous prime is 191442959. The next prime is 191442989. The reversal of 191442984 is 489244191.

It is a happy number.

It is a super-2 number, since 2×191442984² = 73300832245648512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191442989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215389 + ... + 216275.

It is an arithmetic number, because the mean of its divisors is an integer number (5524470).

Almost surely, 2^191442984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191442984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265174560).

191442984 is an abundant number, since it is smaller than the sum of its proper divisors (338906136).

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

191442984 is a wasteful number, since it uses less digits than its factorization.

191442984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 932 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 191442984 is about 13836.2922779190. The cubic root of 191442984 is about 576.3414015813.

The spelling of 191442984 in words is "one hundred ninety-one million, four hundred forty-two thousand, nine hundred eighty-four".