28249152 has 56 divisors (see below), whose sum is σ = 78004416. Its totient is φ = 9005568.

The previous prime is 28249147. The next prime is 28249163. The reversal of 28249152 is 25194282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (1392936).

Almost surely, 2^28249152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28249152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39002208).

28249152 is an abundant number, since it is smaller than the sum of its proper divisors (49755264).

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

28249152 is a wasteful number, since it uses less digits than its factorization.

28249152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6435 (or 6425 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 28249152 is about 5314.9931326390. The cubic root of 28249152 is about 304.5569200190.

The spelling of 28249152 in words is "twenty-eight million, two hundred forty-nine thousand, one hundred fifty-two".