20028600 has 96 divisors (see below), whose sum is σ = 69006000. Its totient is φ = 5339520.

The previous prime is 20028599. The next prime is 20028611. The reversal of 20028600 is 682002.

It is a super-2 number, since 2×20028600² = 802289635920000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3546 + ... + 7254.

Almost surely, 2^20028600 is an apocalyptic number.

20028600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20028600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34503000).

20028600 is an abundant number, since it is smaller than the sum of its proper divisors (48977400).

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

20028600 is a wasteful number, since it uses less digits than its factorization.

20028600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20028600 is about 4475.3323898902. The cubic root of 20028600 is about 271.5710872736.

The spelling of 20028600 in words is "twenty million, twenty-eight thousand, six hundred".