395994821922 has 150 divisors (see below), whose sum is σ = 1036174022433. Its totient is φ = 113029245504.

The previous prime is 395994821909. The next prime is 395994821923. The reversal of 395994821922 is 229128499593.

395994821922 is a `hidden beast` number, since 3 + 9 + 599 + 4 + 8 + 2 + 19 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 380638407681 + 15356414241 = 616959^2 + 123921^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=444969.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 395994821922.

It is not an unprimeable number, because it can be changed into a prime (395994821923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 392462154 + ... + 392463162.

Almost surely, 2^395994821922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 395994821922

395994821922 is an abundant number, since it is smaller than the sum of its proper divisors (640179200511).

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

395994821922 is an frugal number, since it uses more digits than its factorization.

395994821922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060 (or 1021 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The spelling of 395994821922 in words is "three hundred ninety-five billion, nine hundred ninety-four million, eight hundred twenty-one thousand, nine hundred twenty-two".