20768028 has 24 divisors (see below), whose sum is σ = 48546960. Its totient is φ = 6910080.

The previous prime is 20768023. The next prime is 20768029. The reversal of 20768028 is 82086702.

It is a self number, because there is not a number n which added to its sum of digits gives 20768028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20768021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7288 + ... + 9728.

It is an arithmetic number, because the mean of its divisors is an integer number (2022790).

Almost surely, 2^20768028 is an apocalyptic number.

It is an amenable number.

20768028 is an abundant number, since it is smaller than the sum of its proper divisors (27778932).

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

20768028 is a wasteful number, since it uses less digits than its factorization.

20768028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157 (or 3155 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 20768028 is about 4557.1951900264. The cubic root of 20768028 is about 274.8727918545.

The spelling of 20768028 in words is "twenty million, seven hundred sixty-eight thousand, twenty-eight".