396665894 has 8 divisors (see below), whose sum is σ = 614192448. Its totient is φ = 191935080.

The previous prime is 396665887. The next prime is 396665897. The reversal of 396665894 is 498566693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396665897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3198857 + ... + 3198980.

It is an arithmetic number, because the mean of its divisors is an integer number (76774056).

Almost surely, 2^396665894 is an apocalyptic number.

396665894 is a deficient number, since it is larger than the sum of its proper divisors (217526554).

396665894 is a wasteful number, since it uses less digits than its factorization.

396665894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397870.

The product of its digits is 8398080, while the sum is 56.

The square root of 396665894 is about 19916.4729307174. The cubic root of 396665894 is about 734.7534267849.

The spelling of 396665894 in words is "three hundred ninety-six million, six hundred sixty-five thousand, eight hundred ninety-four".