28249600 has 60 divisors (see below), whose sum is σ = 70022304. Its totient is φ = 11294720.

The previous prime is 28249591. The next prime is 28249607. The reversal of 28249600 is 694282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28249607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11697 + ... + 13903.

Almost surely, 2^28249600 is an apocalyptic number.

28249600 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 28249600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35011152).

28249600 is an abundant number, since it is smaller than the sum of its proper divisors (41772704).

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

28249600 is an equidigital number, since it uses as much as digits as its factorization.

28249600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28249600 is about 5315.0352773994. The cubic root of 28249600 is about 304.5585299880.

The spelling of 28249600 in words is "twenty-eight million, two hundred forty-nine thousand, six hundred".