28683900 has 216 divisors, whose sum is σ = 106972320. Its totient is φ = 6289920.

The previous prime is 28683883. The next prime is 28683923. The reversal of 28683900 is 938682.

It is a super-2 number, since 2×28683900² = 1645532238420000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 182622 + ... + 182778.

Almost surely, 2^28683900 is an apocalyptic number.

28683900 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 28683900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53486160).

28683900 is an abundant number, since it is smaller than the sum of its proper divisors (78288420).

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

28683900 is a wasteful number, since it uses less digits than its factorization.

28683900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28683900 is about 5355.7352436430. The cubic root of 28683900 is about 306.1113269156. Note that the first 3 decimals are identical.

The spelling of 28683900 in words is "twenty-eight million, six hundred eighty-three thousand, nine hundred".