408791889 has 24 divisors (see below), whose sum is σ = 645064992. Its totient is φ = 247403520.

The previous prime is 408791879. The next prime is 408791893. The reversal of 408791889 is 988197804.

It is not a de Polignac number, because 408791889 - 2⁹ = 408791377 is a prime.

It is a super-2 number, since 2×408791889² = 334221617024376642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408791869) 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, 79377 + ... + 84369.

It is an arithmetic number, because the mean of its divisors is an integer number (26877708).

Almost surely, 2^408791889 is an apocalyptic number.

It is an amenable number.

408791889 is a deficient number, since it is larger than the sum of its proper divisors (236273103).

408791889 is a wasteful number, since it uses less digits than its factorization.

408791889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837 (or 5834 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 408791889 is about 20218.6025481486. The cubic root of 408791889 is about 742.1654909217.

It can be divided in two parts, 408 and 791889, that added together give a palindrome (792297).

The spelling of 408791889 in words is "four hundred eight million, seven hundred ninety-one thousand, eight hundred eighty-nine".