2728520 has 16 divisors (see below), whose sum is σ = 6139260. Its totient is φ = 1091392.

The previous prime is 2728519. The next prime is 2728541. The reversal of 2728520 is 258272.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 58564 = 1634^2 + 242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2728520.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34067 + ... + 34146.

2^2728520 is an apocalyptic number.

2728520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2728520 is an abundant number, since it is smaller than the sum of its proper divisors (3410740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2728520 is a wasteful number, since it uses less digits than its factorization.

2728520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68224 (or 68220 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2728520 is about 1651.8232350951. The cubic root of 2728520 is about 139.7362380749.

The spelling of 2728520 in words is "two million, seven hundred twenty-eight thousand, five hundred twenty".