2728420 has 12 divisors (see below), whose sum is σ = 5729724. Its totient is φ = 1091360.

The previous prime is 2728409. The next prime is 2728447. The reversal of 2728420 is 248272.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 2244004 = 696^2 + 1498^2 .

It is a super-3 number, since 3×2728420³ = 60933332086715064000, which contains 333 as substring.

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, 68191 + ... + 68230.

It is an arithmetic number, because the mean of its divisors is an integer number (477477).

2^2728420 is an apocalyptic number.

2728420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2728420 is an abundant number, since it is smaller than the sum of its proper divisors (3001304).

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

2728420 is a wasteful number, since it uses less digits than its factorization.

2728420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136430 (or 136428 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 2728420 is about 1651.7929652351. The cubic root of 2728420 is about 139.7345309474.

The spelling of 2728420 in words is "two million, seven hundred twenty-eight thousand, four hundred twenty".