28889352 has 64 divisors (see below), whose sum is σ = 81312000. Its totient is φ = 9502272.

The previous prime is 28889351. The next prime is 28889353. The reversal of 28889352 is 25398882.

It is an interprime number because it is at equal distance from previous prime (28889351) and next prime (28889353).

It is a junction number, because it is equal to n+sod(n) for n = 28889298 and 28889307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28889351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16218 + ... + 17910.

It is an arithmetic number, because the mean of its divisors is an integer number (1270500).

Almost surely, 2^28889352 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 28889352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40656000).

28889352 is an abundant number, since it is smaller than the sum of its proper divisors (52422648).

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

28889352 is a wasteful number, since it uses less digits than its factorization.

28889352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787 (or 1777 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 28889352 is about 5374.8815800909. The cubic root of 28889352 is about 306.8404423624.

It can be divided in two parts, 28889 and 352, that added together give a square (29241 = 171²).

The spelling of 28889352 in words is "twenty-eight million, eight hundred eighty-nine thousand, three hundred fifty-two".