2528857840 has 20 divisors (see below), whose sum is σ = 5879594664. Its totient is φ = 1011543104.

The previous prime is 2528857817. The next prime is 2528857873. The reversal of 2528857840 is 487588252.

It is a tau number, because it is divible by the number of its divisors (20).

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, 15805282 + ... + 15805441.

Almost surely, 2^2528857840 is an apocalyptic number.

2528857840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2528857840 is an abundant number, since it is smaller than the sum of its proper divisors (3350736824).

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

2528857840 is a wasteful number, since it uses less digits than its factorization.

2528857840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31610736 (or 31610730 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 49.

The square root of 2528857840 is about 50287.7503970897. The cubic root of 2528857840 is about 1362.4109914640.

The spelling of 2528857840 in words is "two billion, five hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred forty".