28231600 has 60 divisors (see below), whose sum is σ = 68400136. Its totient is φ = 11197440.

The previous prime is 28231597. The next prime is 28231613. The reversal of 28231600 is 613282.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64984 + ... + 65416.

Almost surely, 2^28231600 is an apocalyptic number.

28231600 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 28231600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34200068).

28231600 is an abundant number, since it is smaller than the sum of its proper divisors (40168536).

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

28231600 is a wasteful number, since it uses less digits than its factorization.

28231600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28231600 is about 5313.3416980277. The cubic root of 28231600 is about 304.4938303309.

Adding to 28231600 its reverse (613282), we get a palindrome (28844882).

The spelling of 28231600 in words is "twenty-eight million, two hundred thirty-one thousand, six hundred".