28285522 has 4 divisors (see below), whose sum is σ = 42428286. Its totient is φ = 14142760.

The previous prime is 28285513. The next prime is 28285541. The reversal of 28285522 is 22558282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21520321 + 6765201 = 4639^2 + 2601^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071379 + ... + 7071382.

Almost surely, 2^28285522 is an apocalyptic number.

28285522 is a deficient number, since it is larger than the sum of its proper divisors (14142764).

28285522 is a wasteful number, since it uses less digits than its factorization.

28285522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14142763.

The product of its digits is 25600, while the sum is 34.

The square root of 28285522 is about 5318.4134852416. The cubic root of 28285522 is about 304.6875668306.

The spelling of 28285522 in words is "twenty-eight million, two hundred eighty-five thousand, five hundred twenty-two".