20288028 has 12 divisors (see below), whose sum is σ = 47338760. Its totient is φ = 6762672.

The previous prime is 20288027. The next prime is 20288033. The reversal of 20288028 is 82088202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20287986 and 20288004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20288027) by changing a digit.

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, 845323 + ... + 845346.

Almost surely, 2^20288028 is an apocalyptic number.

It is an amenable number.

20288028 is an abundant number, since it is smaller than the sum of its proper divisors (27050732).

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

20288028 is a wasteful number, since it uses less digits than its factorization.

20288028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690676 (or 1690674 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 20288028 is about 4504.2233514780. The cubic root of 20288028 is about 272.7386031252.

The spelling of 20288028 in words is "twenty million, two hundred eighty-eight thousand, twenty-eight".