2729645 has 4 divisors (see below), whose sum is σ = 3275580. Its totient is φ = 2183712.

The previous prime is 2729633. The next prime is 2729651. The reversal of 2729645 is 5469272.

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 885481 + 1844164 = 941^2 + 1358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2729645 is a prime.

It is a super-3 number, since 3×2729645³ = 61015442080800033375, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 7³ + 2¹⁹ + 9² + 6⁸ + 4⁵ + 5 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272960 + ... + 272969.

It is an arithmetic number, because the mean of its divisors is an integer number (818895).

2^2729645 is an apocalyptic number.

It is an amenable number.

2729645 is a deficient number, since it is larger than the sum of its proper divisors (545935).

2729645 is an equidigital number, since it uses as much as digits as its factorization.

2729645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545934.

The product of its digits is 30240, while the sum is 35.

The square root of 2729645 is about 1652.1637328062. The cubic root of 2729645 is about 139.7554403857.

The spelling of 2729645 in words is "two million, seven hundred twenty-nine thousand, six hundred forty-five".