28281635 has 8 divisors (see below), whose sum is σ = 34182960. Its totient is φ = 22461984.

The previous prime is 28281629. The next prime is 28281679. The reversal of 28281635 is 53618282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28281635 - 2¹⁸ = 28019491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28281595 and 28281604.

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, 19652 + ... + 21041.

It is an arithmetic number, because the mean of its divisors is an integer number (4272870).

Almost surely, 2^28281635 is an apocalyptic number.

28281635 is a deficient number, since it is larger than the sum of its proper divisors (5901325).

28281635 is a wasteful number, since it uses less digits than its factorization.

28281635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40837.

The product of its digits is 23040, while the sum is 35.

The square root of 28281635 is about 5318.0480441606. The cubic root of 28281635 is about 304.6736094566.

The spelling of 28281635 in words is "twenty-eight million, two hundred eighty-one thousand, six hundred thirty-five".