2649789 has 24 divisors (see below), whose sum is σ = 4036032. Its totient is φ = 1673280.

The previous prime is 2649781. The next prime is 2649799. The reversal of 2649789 is 9879462.

It is a happy number.

It is not a de Polignac number, because 2649789 - 2³ = 2649781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649781) 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 23 ways as a sum of consecutive naturals, for example, 15784 + ... + 15950.

It is an arithmetic number, because the mean of its divisors is an integer number (168168).

2^2649789 is an apocalyptic number.

It is an amenable number.

2649789 is a deficient number, since it is larger than the sum of its proper divisors (1386243).

2649789 is a wasteful number, since it uses less digits than its factorization.

2649789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 254 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2649789 is about 1627.8172501850. The cubic root of 2649789 is about 138.3790774669.

The spelling of 2649789 in words is "two million, six hundred forty-nine thousand, seven hundred eighty-nine".