28339256 has 16 divisors (see below), whose sum is σ = 57966840. Its totient is φ = 12881440.

The previous prime is 28339211. The next prime is 28339273. The reversal of 28339256 is 65293382.

It is a super-2 number, since 2×28339256² = 1606226861267072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160931 + ... + 161106.

Almost surely, 2^28339256 is an apocalyptic number.

It is an amenable number.

28339256 is an abundant number, since it is smaller than the sum of its proper divisors (29627584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28339256 is a wasteful number, since it uses less digits than its factorization.

28339256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322054 (or 322050 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 28339256 is about 5323.4627828135. The cubic root of 28339256 is about 304.8803830859.

The spelling of 28339256 in words is "twenty-eight million, three hundred thirty-nine thousand, two hundred fifty-six".