20800288 has 24 divisors (see below), whose sum is σ = 43107120. Its totient is φ = 9852480.

The previous prime is 20800277. The next prime is 20800291. The reversal of 20800288 is 88200802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16498 + ... + 17713.

It is an arithmetic number, because the mean of its divisors is an integer number (1796130).

Almost surely, 2^20800288 is an apocalyptic number.

It is an amenable number.

20800288 is an abundant number, since it is smaller than the sum of its proper divisors (22306832).

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

20800288 is a wasteful number, since it uses less digits than its factorization.

20800288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34240 (or 34232 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 20800288 is about 4560.7332743760. The cubic root of 20800288 is about 275.0150427033.

The spelling of 20800288 in words is "twenty million, eight hundred thousand, two hundred eighty-eight".