2728989 has 12 divisors (see below), whose sum is σ = 4149600. Its totient is φ = 1723464.

The previous prime is 2728981. The next prime is 2728997. The reversal of 2728989 is 9898272.

It is an interprime number because it is at equal distance from previous prime (2728981) and next prime (2728997).

It is not a de Polignac number, because 2728989 - 2³ = 2728981 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7809 + ... + 8150.

It is an arithmetic number, because the mean of its divisors is an integer number (345800).

2^2728989 is an apocalyptic number.

It is an amenable number.

2728989 is a deficient number, since it is larger than the sum of its proper divisors (1420611).

2728989 is a wasteful number, since it uses less digits than its factorization.

2728989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984 (or 15981 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2728989 is about 1651.9651933379. The cubic root of 2728989 is about 139.7442439463.

It can be divided in two parts, 272 and 8989, that added together give a cube (9261 = 21³).

The spelling of 2728989 in words is "two million, seven hundred twenty-eight thousand, nine hundred eighty-nine".