28056395 has 12 divisors (see below), whose sum is σ = 34794720. Its totient is φ = 21717360.

The previous prime is 28056373. The next prime is 28056403. The reversal of 28056395 is 59365082.

It is not a de Polignac number, because 28056395 - 2¹⁴ = 28040011 is a prime.

It is a super-2 number, since 2×28056395² = 1574322600792050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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 in 11 ways as a sum of consecutive naturals, for example, 1886 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (2899560).

Almost surely, 2^28056395 is an apocalyptic number.

28056395 is a deficient number, since it is larger than the sum of its proper divisors (6738325).

28056395 is an equidigital number, since it uses as much as digits as its factorization.

28056395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906 (or 5875 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 28056395 is about 5296.8287682348. The cubic root of 28056395 is about 303.8626276550.

The spelling of 28056395 in words is "twenty-eight million, fifty-six thousand, three hundred ninety-five".