28384700 has 36 divisors (see below), whose sum is σ = 62391840. Its totient is φ = 11207040.

The previous prime is 28384693. The next prime is 28384709. The reversal of 28384700 is 748382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28384709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6104 + ... + 9696.

Almost surely, 2^28384700 is an apocalyptic number.

28384700 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 28384700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31195920).

28384700 is an abundant number, since it is smaller than the sum of its proper divisors (34007140).

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

28384700 is a wasteful number, since it uses less digits than its factorization.

28384700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686 (or 3679 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28384700 is about 5327.7293474800. The cubic root of 28384700 is about 305.0432618021.

The spelling of 28384700 in words is "twenty-eight million, three hundred eighty-four thousand, seven hundred".