2643650 has 24 divisors (see below), whose sum is σ = 5053620. Its totient is φ = 1028160.

The previous prime is 2643647. The next prime is 2643659. The reversal of 2643650 is 563462.

It can be written as a sum of positive squares in 6 ways, for example, as 866761 + 1776889 = 931^2 + 1333^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2643659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1136 + ... + 2564.

2^2643650 is an apocalyptic number.

2643650 is a deficient number, since it is larger than the sum of its proper divisors (2409970).

2643650 is a wasteful number, since it uses less digits than its factorization.

2643650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478 (or 1473 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2643650 is about 1625.9305028198. The cubic root of 2643650 is about 138.2721298261.

The spelling of 2643650 in words is "two million, six hundred forty-three thousand, six hundred fifty".