2821631636 has 18 divisors (see below), whose sum is σ = 4952570238. Its totient is φ = 1406617440.

The previous prime is 2821631621. The next prime is 2821631641. The reversal of 2821631636 is 6361361282.

It can be written as a sum of positive squares in 3 ways, for example, as 818532100 + 2003099536 = 28610^2 + 44756^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2821631636.

It is a congruent number.

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, 2280410 + ... + 2281646.

It is an arithmetic number, because the mean of its divisors is an integer number (275142791).

Almost surely, 2^2821631636 is an apocalyptic number.

It is an amenable number.

2821631636 is a deficient number, since it is larger than the sum of its proper divisors (2130938602).

2821631636 is an equidigital number, since it uses as much as digits as its factorization.

2821631636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939 (or 1700 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 2821631636 is about 53119.0327095665. The cubic root of 2821631636 is about 1413.0800726681.

The spelling of 2821631636 in words is "two billion, eight hundred twenty-one million, six hundred thirty-one thousand, six hundred thirty-six".