2880661 has 6 divisors (see below), whose sum is σ = 3351030. Its totient is φ = 2469096.

The previous prime is 2880659. The next prime is 2880671. The reversal of 2880661 is 1660882.

It can be written as a sum of positive squares in only one way, i.e., 2869636 + 11025 = 1694^2 + 105^2 .

It is not a de Polignac number, because 2880661 - 2¹ = 2880659 is a prime.

It is a Duffinian number.

2880661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2880641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29346 + ... + 29443.

It is an arithmetic number, because the mean of its divisors is an integer number (558505).

2^2880661 is an apocalyptic number.

It is an amenable number.

2880661 is a deficient number, since it is larger than the sum of its proper divisors (470369).

2880661 is an equidigital number, since it uses as much as digits as its factorization.

2880661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58803 (or 58796 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2880661 is about 1697.2510126672. The cubic root of 2880661 is about 142.2866160992.

The spelling of 2880661 in words is "two million, eight hundred eighty thousand, six hundred sixty-one".