2643729 has 12 divisors (see below), whose sum is σ = 3875088. Its totient is φ = 1602040.

The previous prime is 2643713. The next prime is 2643733. The reversal of 2643729 is 9273462.

It is not a de Polignac number, because 2643729 - 2⁴ = 2643713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a d-powerful number, because it can be written as 2¹⁹ + 6⁴ + 4⁶ + 3⁴ + 7⁵ + 2²¹ + 9 .

It is a self number, because there is not a number n which added to its sum of digits gives 2643729.

It is not an unprimeable number, because it can be changed into a prime (2643709) 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, 3279 + ... + 4004.

It is an arithmetic number, because the mean of its divisors is an integer number (322924).

2^2643729 is an apocalyptic number.

It is an amenable number.

2643729 is a deficient number, since it is larger than the sum of its proper divisors (1231359).

2643729 is a wasteful number, since it uses less digits than its factorization.

2643729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7308 (or 7297 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 2643729 is about 1625.9547964196. The cubic root of 2643729 is about 138.2735071377.

It can be divided in two parts, 264 and 3729, that added together give a palindrome (3993).

The spelling of 2643729 in words is "two million, six hundred forty-three thousand, seven hundred twenty-nine".