2945021768 has 32 divisors (see below), whose sum is σ = 5951076600. Its totient is φ = 1358235648.

The previous prime is 2945021767. The next prime is 2945021791. The reversal of 2945021768 is 8671205492.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2003636644 + 941385124 = 44762^2 + 30682^2 .

It is not an unprimeable number, because it can be changed into a prime (2945021767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141368 + ... + 160856.

Almost surely, 2^2945021768 is an apocalyptic number.

It is an amenable number.

2945021768 is an abundant number, since it is smaller than the sum of its proper divisors (3006054832).

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

2945021768 is a wasteful number, since it uses less digits than its factorization.

2945021768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20961 (or 20957 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 2945021768 is about 54268.0547652115. The cubic root of 2945021768 is about 1433.3849373645.

The spelling of 2945021768 in words is "two billion, nine hundred forty-five million, twenty-one thousand, seven hundred sixty-eight".