28038572 has 6 divisors (see below), whose sum is σ = 49067508. Its totient is φ = 14019284.

The previous prime is 28038551. The next prime is 28038583. The reversal of 28038572 is 27583082.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3504818 + ... + 3504825.

It is an arithmetic number, because the mean of its divisors is an integer number (8177918).

Almost surely, 2^28038572 is an apocalyptic number.

It is an amenable number.

28038572 is a deficient number, since it is larger than the sum of its proper divisors (21028936).

28038572 is a wasteful number, since it uses less digits than its factorization.

28038572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009647 (or 7009645 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28038572 is about 5295.1460791937. The cubic root of 28038572 is about 303.7982704819.

The spelling of 28038572 in words is "twenty-eight million, thirty-eight thousand, five hundred seventy-two".