2808590640 has 80 divisors (see below), whose sum is σ = 9164889600. Its totient is φ = 709537536.

The previous prime is 2808590639. The next prime is 2808590647. The reversal of 2808590640 is 460958082.

2808590640 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 2808590592 and 2808590601.

It is not an unprimeable number, because it can be changed into a prime (2808590647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303400 + ... + 312519.

It is an arithmetic number, because the mean of its divisors is an integer number (114561120).

Almost surely, 2^2808590640 is an apocalyptic number.

2808590640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2808590640 is an abundant number, since it is smaller than the sum of its proper divisors (6356298960).

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

2808590640 is a wasteful number, since it uses less digits than its factorization.

2808590640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615954 (or 615948 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 2808590640 is about 52996.1379724976. The cubic root of 2808590640 is about 1410.8997225297.

The spelling of 2808590640 in words is "two billion, eight hundred eight million, five hundred ninety thousand, six hundred forty".