2720028 has 12 divisors (see below), whose sum is σ = 6346760. Its totient is φ = 906672.

The previous prime is 2720009. The next prime is 2720071. The reversal of 2720028 is 8200272.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2719986 and 2720013.

It is a congruent number.

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, 113323 + ... + 113346.

2^2720028 is an apocalyptic number.

It is an amenable number.

2720028 is an abundant number, since it is smaller than the sum of its proper divisors (3626732).

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

2720028 is a wasteful number, since it uses less digits than its factorization.

2720028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226676 (or 226674 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 2720028 is about 1649.2507389721. The cubic root of 2720028 is about 139.5911199240.

The spelling of 2720028 in words is "two million, seven hundred twenty thousand, twenty-eight".