28425668 has 12 divisors (see below), whose sum is σ = 49789740. Its totient is φ = 14200032.

The previous prime is 28425643. The next prime is 28425671. The reversal of 28425668 is 86652482.

It can be written as a sum of positive squares in 2 ways, for example, as 9048064 + 19377604 = 3008^2 + 4402^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230 + ... + 8202.

It is an arithmetic number, because the mean of its divisors is an integer number (4149145).

Almost surely, 2^28425668 is an apocalyptic number.

It is an amenable number.

28425668 is a deficient number, since it is larger than the sum of its proper divisors (21364072).

28425668 is a wasteful number, since it uses less digits than its factorization.

28425668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406 (or 6404 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 28425668 is about 5331.5727510745. The cubic root of 28425668 is about 305.1899488647.

It can be divided in two parts, 284 and 25668, that added together give a palindrome (25952).

The spelling of 28425668 in words is "twenty-eight million, four hundred twenty-five thousand, six hundred sixty-eight".