28236475 has 6 divisors (see below), whose sum is σ = 35013260. Its totient is φ = 22589160.

The previous prime is 28236463. The next prime is 28236491. The reversal of 28236475 is 57463282.

It is not a de Polignac number, because 28236475 - 2⁷ = 28236347 is a prime.

It is a super-7 number, since 7×28236475⁷ (a number of 54 digits) contains 7777777 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564705 + ... + 564754.

Almost surely, 2^28236475 is an apocalyptic number.

28236475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28236475 is a deficient number, since it is larger than the sum of its proper divisors (6776785).

28236475 is a wasteful number, since it uses less digits than its factorization.

28236475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129469 (or 1129464 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 28236475 is about 5313.8004290715. The cubic root of 28236475 is about 304.5113558696.

The spelling of 28236475 in words is "twenty-eight million, two hundred thirty-six thousand, four hundred seventy-five".