2802649 has 4 divisors (see below), whose sum is σ = 2830500. Its totient is φ = 2774800.

The previous prime is 2802643. The next prime is 2802659. The reversal of 2802649 is 9462082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1871424 + 931225 = 1368^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2802649 - 2³ = 2802641 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹⁶ + 8⁴ + 0 + 2²⁰ + 6⁸ + 4⁶ + 9³ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2802649.

It is not an unprimeable number, because it can be changed into a prime (2802641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13774 + ... + 13975.

It is an arithmetic number, because the mean of its divisors is an integer number (707625).

2^2802649 is an apocalyptic number.

It is an amenable number.

2802649 is a deficient number, since it is larger than the sum of its proper divisors (27851).

2802649 is a wasteful number, since it uses less digits than its factorization.

2802649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27850.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2802649 is about 1674.1114060898. Note that the first 3 decimals coincide. The cubic root of 2802649 is about 140.9904089514.

The spelling of 2802649 in words is "two million, eight hundred two thousand, six hundred forty-nine".