2821001940 has 36 divisors (see below), whose sum is σ = 8557039764. Its totient is φ = 752267136.

The previous prime is 2821001933. The next prime is 2821001977. The reversal of 2821001940 is 491001282.

It can be written as a sum of positive squares in 2 ways, for example, as 1951695684 + 869306256 = 44178^2 + 29484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7835937 + ... + 7836296.

It is an arithmetic number, because the mean of its divisors is an integer number (237695549).

Almost surely, 2^2821001940 is an apocalyptic number.

2821001940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2821001940 is an abundant number, since it is smaller than the sum of its proper divisors (5736037824).

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

2821001940 is a wasteful number, since it uses less digits than its factorization.

2821001940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672248 (or 15672243 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2821001940 is about 53113.1051624738. The cubic root of 2821001940 is about 1412.9749470783.

The spelling of 2821001940 in words is "two billion, eight hundred twenty-one million, one thousand, nine hundred forty".