28275576 has 64 divisors (see below), whose sum is σ = 82529280. Its totient is φ = 7904640.

The previous prime is 28275571. The next prime is 28275587. The reversal of 28275576 is 67557282.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28275571) 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, 6106 + ... + 9686.

It is an arithmetic number, because the mean of its divisors is an integer number (1289520).

Almost surely, 2^28275576 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 28275576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41264640).

28275576 is an abundant number, since it is smaller than the sum of its proper divisors (54253704).

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

28275576 is a wasteful number, since it uses less digits than its factorization.

28275576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644 (or 3640 counting only the distinct ones).

The product of its digits is 235200, while the sum is 42.

The square root of 28275576 is about 5317.4783497444. The cubic root of 28275576 is about 304.6518503510.

The spelling of 28275576 in words is "twenty-eight million, two hundred seventy-five thousand, five hundred seventy-six".