396037821805 has 32 divisors (see below), whose sum is σ = 481073380704. Its totient is φ = 312966291456.

The previous prime is 396037821797. The next prime is 396037821841. The reversal of 396037821805 is 508128730693.

It can be written as a sum of positive squares in 16 ways, for example, as 329772250564 + 66265571241 = 574258^2 + 257421^2 .

It is a cyclic number.

It is not a de Polignac number, because 396037821805 - 2³ = 396037821797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422665297 + ... + 422666233.

It is an arithmetic number, because the mean of its divisors is an integer number (15033543147).

Almost surely, 2^396037821805 is an apocalyptic number.

It is an amenable number.

396037821805 is a deficient number, since it is larger than the sum of its proper divisors (85035558899).

396037821805 is a wasteful number, since it uses less digits than its factorization.

396037821805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 396037821805 in words is "three hundred ninety-six billion, thirty-seven million, eight hundred twenty-one thousand, eight hundred five".