2821538660 has 12 divisors (see below), whose sum is σ = 5925231228. Its totient is φ = 1128615456.

The previous prime is 2821538659. The next prime is 2821538683. The reversal of 2821538660 is 668351282.

It can be written as a sum of positive squares in 2 ways, for example, as 1373888356 + 1447650304 = 37066^2 + 38048^2 .

It is a super-2 number, since 2×2821538660² = 15922160819749191200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70538447 + ... + 70538486.

It is an arithmetic number, because the mean of its divisors is an integer number (493769269).

Almost surely, 2^2821538660 is an apocalyptic number.

2821538660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2821538660 is an abundant number, since it is smaller than the sum of its proper divisors (3103692568).

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

2821538660 is a wasteful number, since it uses less digits than its factorization.

2821538660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141076942 (or 141076940 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 2821538660 is about 53118.1575358182. The cubic root of 2821538660 is about 1413.0645516277.

The spelling of 2821538660 in words is "two billion, eight hundred twenty-one million, five hundred thirty-eight thousand, six hundred sixty".