2980809 has 24 divisors (see below), whose sum is σ = 4713800. Its totient is φ = 1804032.

The previous prime is 2980801. The next prime is 2980811. The reversal of 2980809 is 9080892.

It can be written as a sum of positive squares in 4 ways, for example, as 356409 + 2624400 = 597^2 + 1620^2 .

It is not a de Polignac number, because 2980809 - 2³ = 2980801 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2980801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8367 + ... + 8715.

2^2980809 is an apocalyptic number.

It is an amenable number.

2980809 is a deficient number, since it is larger than the sum of its proper divisors (1732991).

2980809 is a wasteful number, since it uses less digits than its factorization.

2980809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2980809 is about 1726.5019548208. The cubic root of 2980809 is about 143.9167632383.

The spelling of 2980809 in words is "two million, nine hundred eighty thousand, eight hundred nine".