2761828021 has 6 divisors (see below), whose sum is σ = 2860348322. Its totient is φ = 2666591760.

The previous prime is 2761828001. The next prime is 2761828031. The reversal of 2761828021 is 1208281672.

2761828021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 114725521 + 2647102500 = 10711^2 + 51450^2 .

It is not a de Polignac number, because 2761828021 - 2⁵ = 2761827989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2761828001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1641150 + ... + 1642831.

Almost surely, 2^2761828021 is an apocalyptic number.

It is an amenable number.

2761828021 is a deficient number, since it is larger than the sum of its proper divisors (98520301).

2761828021 is an equidigital number, since it uses as much as digits as its factorization.

2761828021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284039 (or 3284010 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 2761828021 is about 52553.0971589687. The cubic root of 2761828021 is about 1403.0254336162.

The spelling of 2761828021 in words is "two billion, seven hundred sixty-one million, eight hundred twenty-eight thousand, twenty-one".