28233750 has 40 divisors (see below), whose sum is σ = 70571160. Its totient is φ = 7528000.

The previous prime is 28233749. The next prime is 28233823. The reversal of 28233750 is 5733282.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15 + ... + 7514.

It is an arithmetic number, because the mean of its divisors is an integer number (1764279).

Almost surely, 2^28233750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28233750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35285580).

28233750 is an abundant number, since it is smaller than the sum of its proper divisors (42337410).

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

28233750 is an equidigital number, since it uses as much as digits as its factorization.

28233750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554 (or 7539 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 28233750 is about 5313.5440150619. The cubic root of 28233750 is about 304.5015597915.

The spelling of 28233750 in words is "twenty-eight million, two hundred thirty-three thousand, seven hundred fifty".