2808998640 has 240 divisors, whose sum is σ = 10855543296. Its totient is φ = 637632000.

The previous prime is 2808998639. The next prime is 2808998641. The reversal of 2808998640 is 468998082.

It is an interprime number because it is at equal distance from previous prime (2808998639) and next prime (2808998641).

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808998641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 759195 + ... + 762885.

Almost surely, 2^2808998640 is an apocalyptic number.

2808998640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2808998640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5427771648).

2808998640 is an abundant number, since it is smaller than the sum of its proper divisors (8046544656).

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

2808998640 is a wasteful number, since it uses less digits than its factorization.

2808998640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 2808998640 is about 52999.9871698098. The cubic root of 2808998640 is about 1410.9680390258.

The spelling of 2808998640 in words is "two billion, eight hundred eight million, nine hundred ninety-eight thousand, six hundred forty".