2728157 has 4 divisors (see below), whose sum is σ = 2738496. Its totient is φ = 2717820.

The previous prime is 2728129. The next prime is 2728163. The reversal of 2728157 is 7518272.

2728157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2728157 - 2¹² = 2724061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4763 + ... + 5304.

It is an arithmetic number, because the mean of its divisors is an integer number (684624).

2^2728157 is an apocalyptic number.

It is an amenable number.

2728157 is a deficient number, since it is larger than the sum of its proper divisors (10339).

2728157 is a wasteful number, since it uses less digits than its factorization.

2728157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338.

The product of its digits is 7840, while the sum is 32.

The square root of 2728157 is about 1651.7133528551. The cubic root of 2728157 is about 139.7300410029.

The spelling of 2728157 in words is "two million, seven hundred twenty-eight thousand, one hundred fifty-seven".