28426305 has 32 divisors (see below), whose sum is σ = 47282688. Its totient is φ = 14572800.

The previous prime is 28426303. The next prime is 28426309. The reversal of 28426305 is 50362482.

It is not a de Polignac number, because 28426305 - 2¹ = 28426303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28426301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42675 + ... + 43335.

It is an arithmetic number, because the mean of its divisors is an integer number (1477584).

Almost surely, 2^28426305 is an apocalyptic number.

It is an amenable number.

28426305 is a deficient number, since it is larger than the sum of its proper divisors (18856383).

28426305 is a wasteful number, since it uses less digits than its factorization.

28426305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28426305 is about 5331.6324892100. The cubic root of 28426305 is about 305.1922285478.

Adding to 28426305 its reverse (50362482), we get a palindrome (78788787).

The spelling of 28426305 in words is "twenty-eight million, four hundred twenty-six thousand, three hundred five".