28784522 has 16 divisors (see below), whose sum is σ = 46843272. Its totient is φ = 13186560.

The previous prime is 28784467. The next prime is 28784527. The reversal of 28784522 is 22548782.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18931201 + 9853321 = 4351^2 + 3139^2 .

It is not an unprimeable number, because it can be changed into a prime (28784527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479 + ... + 7602.

Almost surely, 2^28784522 is an apocalyptic number.

28784522 is a deficient number, since it is larger than the sum of its proper divisors (18058750).

28784522 is a wasteful number, since it uses less digits than its factorization.

28784522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233.

The product of its digits is 71680, while the sum is 38.

The square root of 28784522 is about 5365.1208746868. The cubic root of 28784522 is about 306.4688513702.

The spelling of 28784522 in words is "twenty-eight million, seven hundred eighty-four thousand, five hundred twenty-two".