2728658 has 4 divisors (see below), whose sum is σ = 4092990. Its totient is φ = 1364328.

The previous prime is 2728657. The next prime is 2728669. The reversal of 2728658 is 8568272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2140369 + 588289 = 1463^2 + 767^2 .

It is not an unprimeable number, because it can be changed into a prime (2728657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682163 + ... + 682166.

2^2728658 is an apocalyptic number.

2728658 is a deficient number, since it is larger than the sum of its proper divisors (1364332).

2728658 is a wasteful number, since it uses less digits than its factorization.

2728658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364331.

The product of its digits is 53760, while the sum is 38.

The square root of 2728658 is about 1651.8650065910. The cubic root of 2728658 is about 139.7385938423.

The spelling of 2728658 in words is "two million, seven hundred twenty-eight thousand, six hundred fifty-eight".