2728742 has 8 divisors (see below), whose sum is σ = 4308600. Its totient is φ = 1292544.

The previous prime is 2728741. The next prime is 2728751. The reversal of 2728742 is 2478272.

It is a happy number.

2728742 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2728699 and 2728708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728741) 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, 35867 + ... + 35942.

It is an arithmetic number, because the mean of its divisors is an integer number (538575).

2^2728742 is an apocalyptic number.

2728742 is a deficient number, since it is larger than the sum of its proper divisors (1579858).

2728742 is a wasteful number, since it uses less digits than its factorization.

2728742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71830.

The product of its digits is 12544, while the sum is 32.

The square root of 2728742 is about 1651.8904322018. The cubic root of 2728742 is about 139.7400277488.

The spelling of 2728742 in words is "two million, seven hundred twenty-eight thousand, seven hundred forty-two".