28380256 has 24 divisors (see below), whose sum is σ = 56226744. Its totient is φ = 14100480.

The previous prime is 28380251. The next prime is 28380263. The reversal of 28380256 is 65208382.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2496 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (2342781).

Almost surely, 2^28380256 is an apocalyptic number.

It is an amenable number.

28380256 is a deficient number, since it is larger than the sum of its proper divisors (27846488).

28380256 is a wasteful number, since it uses less digits than its factorization.

28380256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614 (or 5606 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28380256 is about 5327.3122679265. The cubic root of 28380256 is about 305.0273414529.

The spelling of 28380256 in words is "twenty-eight million, three hundred eighty thousand, two hundred fifty-six".