28527564 has 96 divisors (see below), whose sum is σ = 78575616. Its totient is φ = 7971840.

The previous prime is 28527563. The next prime is 28527571. The reversal of 28527564 is 46572582.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28527563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82039 + ... + 82385.

It is an arithmetic number, because the mean of its divisors is an integer number (818496).

Almost surely, 2^28527564 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 28527564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39287808).

28527564 is an abundant number, since it is smaller than the sum of its proper divisors (50048052).

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

28527564 is a wasteful number, since it uses less digits than its factorization.

28527564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 413 counting only the distinct ones).

The product of its digits is 134400, while the sum is 39.

The square root of 28527564 is about 5341.1201072434. The cubic root of 28527564 is about 305.5541801273.

The spelling of 28527564 in words is "twenty-eight million, five hundred twenty-seven thousand, five hundred sixty-four".