396891 has 24 divisors (see below), whose sum is σ = 661440. Its totient is φ = 226800.

The previous prime is 396887. The next prime is 396919. The reversal of 396891 is 198693.

396891 = 3³ + 4³ + ... + 35³.

It is not a de Polignac number, because 396891 - 2² = 396887 is a prime.

396891 is a modest number, since divided by 891 gives 396 as remainder.

It is not an unprimeable number, because it can be changed into a prime (396871) 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, 1776 + ... + 1986.

It is an arithmetic number, because the mean of its divisors is an integer number (27560).

2³⁹⁶⁸⁹¹ is an apocalyptic number.

396891 is a deficient number, since it is larger than the sum of its proper divisors (264549).

396891 is a wasteful number, since it uses less digits than its factorization.

396891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 244 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 396891 is about 629.9928571024. The cubic root of 396891 is about 73.4892390188.

It can be divided in two parts, 396 and 891, that multiplied together give a square (352836 = 594²).

The spelling of 396891 in words is "three hundred ninety-six thousand, eight hundred ninety-one".