28245236 has 12 divisors (see below), whose sum is σ = 49939428. Its totient is φ = 13976832.

The previous prime is 28245227. The next prime is 28245241. The reversal of 28245236 is 63254282.

It can be written as a sum of positive squares in 2 ways, for example, as 14776336 + 13468900 = 3844^2 + 3670^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36011 + ... + 36786.

It is an arithmetic number, because the mean of its divisors is an integer number (4161619).

Almost surely, 2^28245236 is an apocalyptic number.

It is an amenable number.

28245236 is a deficient number, since it is larger than the sum of its proper divisors (21694192).

28245236 is a wasteful number, since it uses less digits than its factorization.

28245236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72898 (or 72896 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 28245236 is about 5314.6247280499. The cubic root of 28245236 is about 304.5428464401.

The spelling of 28245236 in words is "twenty-eight million, two hundred forty-five thousand, two hundred thirty-six".