28279056 has 40 divisors (see below), whose sum is σ = 78675520. Its totient is φ = 8701056.

The previous prime is 28279039. The next prime is 28279067. The reversal of 28279056 is 65097282.

It is a happy number.

It is a super-2 number, since 2×28279056² = 1599410016502272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22036 + ... + 23283.

It is an arithmetic number, because the mean of its divisors is an integer number (1966888).

Almost surely, 2^28279056 is an apocalyptic number.

28279056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28279056 is an abundant number, since it is smaller than the sum of its proper divisors (50396464).

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

28279056 is a wasteful number, since it uses less digits than its factorization.

28279056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45343 (or 45337 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 28279056 is about 5317.8055624477. The cubic root of 28279056 is about 304.6643481212.

The spelling of 28279056 in words is "twenty-eight million, two hundred seventy-nine thousand, fifty-six".