2817997680 has 80 divisors (see below), whose sum is σ = 8740895904. Its totient is φ = 751027200.

The previous prime is 2817997613. The next prime is 2817997709. The reversal of 2817997680 is 867997182.

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

It is a super-2 number, since 2×2817997680² = 15882221848970764800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2817997680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790462 + ... + 794018.

Almost surely, 2^2817997680 is an apocalyptic number.

2817997680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2817997680 is an abundant number, since it is smaller than the sum of its proper divisors (5922898224).

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

2817997680 is a wasteful number, since it uses less digits than its factorization.

2817997680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6874 (or 6868 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 57.

The square root of 2817997680 is about 53084.8159081295. The cubic root of 2817997680 is about 1412.4731806848.

The spelling of 2817997680 in words is "two billion, eight hundred seventeen million, nine hundred ninety-seven thousand, six hundred eighty".