28274788 has 6 divisors (see below), whose sum is σ = 49480886. Its totient is φ = 14137392.

The previous prime is 28274773. The next prime is 28274801. The reversal of 28274788 is 88747282.

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 11035684 = 4152^2 + 3322^2 .

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, 3534345 + ... + 3534352.

Almost surely, 2^28274788 is an apocalyptic number.

It is an amenable number.

28274788 is a deficient number, since it is larger than the sum of its proper divisors (21206098).

28274788 is a wasteful number, since it uses less digits than its factorization.

28274788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068701 (or 7068699 counting only the distinct ones).

The product of its digits is 401408, while the sum is 46.

The square root of 28274788 is about 5317.4042539570. The cubic root of 28274788 is about 304.6490202538.

The spelling of 28274788 in words is "twenty-eight million, two hundred seventy-four thousand, seven hundred eighty-eight".