2940828021 has 6 divisors (see below), whose sum is σ = 4247862710. Its totient is φ = 1960552008.

The previous prime is 2940828019. The next prime is 2940828031. The reversal of 2940828021 is 1208280492.

It can be written as a sum of positive squares in only one way, i.e., 1636607025 + 1304220996 = 40455^2 + 36114^2 .

It is not a de Polignac number, because 2940828021 - 2¹ = 2940828019 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 (2940828031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163379326 + ... + 163379343.

Almost surely, 2^2940828021 is an apocalyptic number.

It is an amenable number.

2940828021 is a deficient number, since it is larger than the sum of its proper divisors (1307034689).

2940828021 is a wasteful number, since it uses less digits than its factorization.

2940828021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326758675 (or 326758672 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 2940828021 is about 54229.4018130387. The cubic root of 2940828021 is about 1432.7042282582.

The spelling of 2940828021 in words is "two billion, nine hundred forty million, eight hundred twenty-eight thousand, twenty-one".