2821087840 has 48 divisors (see below), whose sum is σ = 6669531792. Its totient is φ = 1127637504.

The previous prime is 2821087837. The next prime is 2821087853. The reversal of 2821087840 is 487801282.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2821087793 and 2821087802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254902 + ... + 265738.

It is an arithmetic number, because the mean of its divisors is an integer number (138948579).

Almost surely, 2^2821087840 is an apocalyptic number.

2821087840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2821087840 is an abundant number, since it is smaller than the sum of its proper divisors (3848443952).

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

2821087840 is a wasteful number, since it uses less digits than its factorization.

2821087840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12479 (or 12471 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 2821087840 is about 53113.9138079656. The cubic root of 2821087840 is about 1412.9892887104.

The spelling of 2821087840 in words is "two billion, eight hundred twenty-one million, eighty-seven thousand, eight hundred forty".