28865052 has 48 divisors (see below), whose sum is σ = 75213600. Its totient is φ = 9573120.

The previous prime is 28865051. The next prime is 28865087. The reversal of 28865052 is 25056882.

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

It is a junction number, because it is equal to n+sod(n) for n = 28864998 and 28865016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28865051) 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, 25474 + ... + 26582.

It is an arithmetic number, because the mean of its divisors is an integer number (1566950).

Almost surely, 2^28865052 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 28865052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37606800).

28865052 is an abundant number, since it is smaller than the sum of its proper divisors (46348548).

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

28865052 is a wasteful number, since it uses less digits than its factorization.

28865052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363 (or 1355 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28865052 is about 5372.6205896192. The cubic root of 28865052 is about 306.7543862693.

The spelling of 28865052 in words is "twenty-eight million, eight hundred sixty-five thousand, fifty-two".