2649889 has 4 divisors (see below), whose sum is σ = 2890800. Its totient is φ = 2408980.

The previous prime is 2649887. The next prime is 2649893. The reversal of 2649889 is 9889462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2649889 - 2¹ = 2649887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2649887) 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, 120439 + ... + 120460.

It is an arithmetic number, because the mean of its divisors is an integer number (722700).

2^2649889 is an apocalyptic number.

It is an amenable number.

2649889 is a deficient number, since it is larger than the sum of its proper divisors (240911).

2649889 is a wasteful number, since it uses less digits than its factorization.

2649889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240910.

The product of its digits is 248832, while the sum is 46.

The square root of 2649889 is about 1627.8479658740. The cubic root of 2649889 is about 138.3808182010.

It can be divided in two parts, 264 and 9889, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 2649889 in words is "two million, six hundred forty-nine thousand, eight hundred eighty-nine".