28664600 has 48 divisors (see below), whose sum is σ = 67000920. Its totient is φ = 11404800.

The previous prime is 28664599. The next prime is 28664611. The reversal of 28664600 is 646682.

It is a happy number.

It is a congruent number.

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, 65984 + ... + 66416.

Almost surely, 2^28664600 is an apocalyptic number.

28664600 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 28664600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33500460).

28664600 is an abundant number, since it is smaller than the sum of its proper divisors (38336320).

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

28664600 is a wasteful number, since it uses less digits than its factorization.

28664600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 28664600 is about 5353.9331336878. The cubic root of 28664600 is about 306.0426557080.

The spelling of 28664600 in words is "twenty-eight million, six hundred sixty-four thousand, six hundred".