2578000820 has 24 divisors (see below), whose sum is σ = 5600485800. Its totient is φ = 995641472.

The previous prime is 2578000757. The next prime is 2578000837. The reversal of 2578000820 is 280008752.

2578000820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 809630116 + 1768370704 = 28454^2 + 42052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2221835 + ... + 2222994.

It is an arithmetic number, because the mean of its divisors is an integer number (233353575).

Almost surely, 2^2578000820 is an apocalyptic number.

2578000820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578000820 is an abundant number, since it is smaller than the sum of its proper divisors (3022484980).

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

2578000820 is a wasteful number, since it uses less digits than its factorization.

2578000820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444867 (or 4444865 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 2578000820 is about 50774.0171741413. The cubic root of 2578000820 is about 1371.1796222952.

The spelling of 2578000820 in words is "two billion, five hundred seventy-eight million, eight hundred twenty", and thus it is an aban number.