382291891 has 16 divisors (see below), whose sum is σ = 400881600. Its totient is φ = 364105728.

The previous prime is 382291867. The next prime is 382291963. The reversal of 382291891 is 198192283.

It is a cyclic number.

It is not a de Polignac number, because 382291891 - 2⁵ = 382291859 is a prime.

It is a super-2 number, since 2×382291891² = 292294179848711762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (382291391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934495 + ... + 934903.

It is an arithmetic number, because the mean of its divisors is an integer number (25055100).

Almost surely, 2^382291891 is an apocalyptic number.

382291891 is a deficient number, since it is larger than the sum of its proper divisors (18589709).

382291891 is a wasteful number, since it uses less digits than its factorization.

382291891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798.

The product of its digits is 62208, while the sum is 43.

The square root of 382291891 is about 19552.2860811722. The cubic root of 382291891 is about 725.7689129616.

The spelling of 382291891 in words is "three hundred eighty-two million, two hundred ninety-one thousand, eight hundred ninety-one".