28789952 has 28 divisors (see below), whose sum is σ = 57668160. Its totient is φ = 14259456.

The previous prime is 28789933. The next prime is 28789973. The reversal of 28789952 is 25998782.

It is a super-2 number, since 2×28789952² = 1657722672324608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28789952.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4913 + ... + 9039.

Almost surely, 2^28789952 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 28789952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28834080).

28789952 is an abundant number, since it is smaller than the sum of its proper divisors (28878208).

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

28789952 is a wasteful number, since it uses less digits than its factorization.

28789952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4238 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 28789952 is about 5365.6268972041. The cubic root of 28789952 is about 306.4881212314.

The spelling of 28789952 in words is "twenty-eight million, seven hundred eighty-nine thousand, nine hundred fifty-two".