396491771 has 16 divisors (see below), whose sum is σ = 438600960. Its totient is φ = 356090880.

The previous prime is 396491759. The next prime is 396491783. The reversal of 396491771 is 177194693.

It is an interprime number because it is at equal distance from previous prime (396491759) and next prime (396491783).

It is a cyclic number.

It is not a de Polignac number, because 396491771 - 2¹⁸ = 396229627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396491071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254531 + ... + 256083.

It is an arithmetic number, because the mean of its divisors is an integer number (27412560).

Almost surely, 2^396491771 is an apocalyptic number.

396491771 is a deficient number, since it is larger than the sum of its proper divisors (42109189).

396491771 is a wasteful number, since it uses less digits than its factorization.

396491771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086.

The product of its digits is 285768, while the sum is 47.

The square root of 396491771 is about 19912.1011196709. The cubic root of 396491771 is about 734.6459003607.

The spelling of 396491771 in words is "three hundred ninety-six million, four hundred ninety-one thousand, seven hundred seventy-one".