396821466 has 12 divisors (see below), whose sum is σ = 859779882. Its totient is φ = 132273816.

The previous prime is 396821449. The next prime is 396821473. The reversal of 396821466 is 664128693.

It can be written as a sum of positive squares in only one way, i.e., 375003225 + 21818241 = 19365^2 + 4671^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11022801 + ... + 11022836.

Almost surely, 2^396821466 is an apocalyptic number.

396821466 is an abundant number, since it is smaller than the sum of its proper divisors (462958416).

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

396821466 is a wasteful number, since it uses less digits than its factorization.

396821466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22045645 (or 22045642 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 396821466 is about 19920.3781590611. The cubic root of 396821466 is about 734.8494707700.

The spelling of 396821466 in words is "three hundred ninety-six million, eight hundred twenty-one thousand, four hundred sixty-six".