396860891 has 4 divisors (see below), whose sum is σ = 453555312. Its totient is φ = 340166472.

The previous prime is 396860881. The next prime is 396860897. The reversal of 396860891 is 198068693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396860891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396860897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28347200 + ... + 28347213.

It is an arithmetic number, because the mean of its divisors is an integer number (113388828).

Almost surely, 2^396860891 is an apocalyptic number.

396860891 is a deficient number, since it is larger than the sum of its proper divisors (56694421).

396860891 is an equidigital number, since it uses as much as digits as its factorization.

396860891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56694420.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 396860891 is about 19921.3676990311. The cubic root of 396860891 is about 734.8738062151.

The spelling of 396860891 in words is "three hundred ninety-six million, eight hundred sixty thousand, eight hundred ninety-one".