28863252 has 72 divisors (see below), whose sum is σ = 83079360. Its totient is φ = 8363520.

The previous prime is 28863239. The next prime is 28863269. The reversal of 28863252 is 25236882.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7524 + ... + 10692.

It is an arithmetic number, because the mean of its divisors is an integer number (1153880).

Almost surely, 2^28863252 is an apocalyptic number.

28863252 is a gapful number since it is divisible by the number (22) 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 28863252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41539680).

28863252 is an abundant number, since it is smaller than the sum of its proper divisors (54216108).

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

28863252 is a wasteful number, since it uses less digits than its factorization.

28863252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213 (or 3208 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28863252 is about 5372.4530709909. The cubic root of 28863252 is about 306.7480098228.

The spelling of 28863252 in words is "twenty-eight million, eight hundred sixty-three thousand, two hundred fifty-two".