2585720028 has 12 divisors (see below), whose sum is σ = 6033346760. Its totient is φ = 861906672.

The previous prime is 2585720021. The next prime is 2585720029. The reversal of 2585720028 is 8200275852.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585720021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107738323 + ... + 107738346.

Almost surely, 2^2585720028 is an apocalyptic number.

It is an amenable number.

2585720028 is an abundant number, since it is smaller than the sum of its proper divisors (3447626732).

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

2585720028 is a wasteful number, since it uses less digits than its factorization.

2585720028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215476676 (or 215476674 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 2585720028 is about 50849.9756932095. The cubic root of 2585720028 is about 1372.5468153016.

The spelling of 2585720028 in words is "two billion, five hundred eighty-five million, seven hundred twenty thousand, twenty-eight".