396841664 has 56 divisors (see below), whose sum is σ = 819302400. Its totient is φ = 190506240.

The previous prime is 396841637. The next prime is 396841673. The reversal of 396841664 is 466148693.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275057 + ... + 276495.

It is an arithmetic number, because the mean of its divisors is an integer number (14630400).

Almost surely, 2^396841664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396841664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409651200).

396841664 is an abundant number, since it is smaller than the sum of its proper divisors (422460736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

396841664 is a wasteful number, since it uses less digits than its factorization.

396841664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621 (or 1611 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 396841664 is about 19920.8851208976. The cubic root of 396841664 is about 734.8619383733.

The spelling of 396841664 in words is "three hundred ninety-six million, eight hundred forty-one thousand, six hundred sixty-four".