2728257 has 8 divisors (see below), whose sum is σ = 4157376. Its totient is φ = 1558992.

The previous prime is 2728247. The next prime is 2728259. The reversal of 2728257 is 7528272.

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

It is not a de Polignac number, because 2728257 - 2⁴ = 2728241 is a prime.

2728257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2728259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64938 + ... + 64979.

It is an arithmetic number, because the mean of its divisors is an integer number (519672).

2^2728257 is an apocalyptic number.

It is an amenable number.

2728257 is a deficient number, since it is larger than the sum of its proper divisors (1429119).

2728257 is a wasteful number, since it uses less digits than its factorization.

2728257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129927.

The product of its digits is 15680, while the sum is 33.

The square root of 2728257 is about 1651.7436241742. The cubic root of 2728257 is about 139.7317482401.

The spelling of 2728257 in words is "two million, seven hundred twenty-eight thousand, two hundred fifty-seven".