20028368 has 30 divisors (see below), whose sum is σ = 39787074. Its totient is φ = 9766848.

The previous prime is 20028347. The next prime is 20028389. The reversal of 20028368 is 86382002.

It is an interprime number because it is at equal distance from previous prime (20028347) and next prime (20028389).

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 29584 = 4472^2 + 172^2 .

It is a super-2 number, since 2×20028368² = 802271049486848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20028368.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29246 + ... + 29922.

Almost surely, 2^20028368 is an apocalyptic number.

It is an amenable number.

20028368 is a deficient number, since it is larger than the sum of its proper divisors (19758706).

20028368 is an equidigital number, since it uses as much as digits as its factorization.

20028368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20028368 is about 4475.3064699526. The cubic root of 20028368 is about 271.5700386941.

The spelling of 20028368 in words is "twenty million, twenty-eight thousand, three hundred sixty-eight".