891404 has 24 divisors (see below), whose sum is σ = 1691760. Its totient is φ = 409536.

The previous prime is 891391. The next prime is 891409. The reversal of 891404 is 404198.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891404.

It is not an unprimeable number, because it can be changed into a prime (891409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2654 + ... + 2970.

It is an arithmetic number, because the mean of its divisors is an integer number (70490).

2⁸⁹¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

891404 is a deficient number, since it is larger than the sum of its proper divisors (800356).

891404 is a wasteful number, since it uses less digits than its factorization.

891404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 891404 is about 944.1419384817. The cubic root of 891404 is about 96.2405714045.

The spelling of 891404 in words is "eight hundred ninety-one thousand, four hundred four".