2164887808 has 18 divisors (see below), whose sum is σ = 4321319534. Its totient is φ = 1082443776.

The previous prime is 2164887793. The next prime is 2164887841. The reversal of 2164887808 is 8087884612.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1502957824 + 661929984 = 38768^2 + 25728^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4228041 + ... + 4228552.

Almost surely, 2^2164887808 is an apocalyptic number.

It is an amenable number.

2164887808 is a deficient number, since it is larger than the sum of its proper divisors (2156431726).

2164887808 is an frugal number, since it uses more digits than its factorization.

2164887808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8456609 (or 8456595 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 52.

The square root of 2164887808 is about 46528.3548817278. The cubic root of 2164887808 is about 1293.6351223568.

The spelling of 2164887808 in words is "two billion, one hundred sixty-four million, eight hundred eighty-seven thousand, eight hundred eight".