396906861 has 16 divisors (see below), whose sum is σ = 578427584. Its totient is φ = 240603264.

The previous prime is 396906859. The next prime is 396906863. The reversal of 396906861 is 168609693.

It is an interprime number because it is at equal distance from previous prime (396906859) and next prime (396906863).

It is not a de Polignac number, because 396906861 - 2¹ = 396906859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 396906861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396906863) 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, 73336 + ... + 78561.

It is an arithmetic number, because the mean of its divisors is an integer number (36151724).

Almost surely, 2^396906861 is an apocalyptic number.

It is an amenable number.

396906861 is a deficient number, since it is larger than the sum of its proper divisors (181520723).

396906861 is a wasteful number, since it uses less digits than its factorization.

396906861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151980.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 396906861 is about 19922.5214518645. The cubic root of 396906861 is about 734.9021795867.

The spelling of 396906861 in words is "three hundred ninety-six million, nine hundred six thousand, eight hundred sixty-one".