28038436 has 6 divisors (see below), whose sum is σ = 49067270. Its totient is φ = 14019216.

The previous prime is 28038421. The next prime is 28038499. The reversal of 28038436 is 63483082.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 2232036 = 5080^2 + 1494^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3504801 + ... + 3504808.

Almost surely, 2^28038436 is an apocalyptic number.

It is an amenable number.

28038436 is a deficient number, since it is larger than the sum of its proper divisors (21028834).

28038436 is a wasteful number, since it uses less digits than its factorization.

28038436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009613 (or 7009611 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 28038436 is about 5295.1332372283. The cubic root of 28038436 is about 303.7977792938.

The spelling of 28038436 in words is "twenty-eight million, thirty-eight thousand, four hundred thirty-six".