28228735 has 8 divisors (see below), whose sum is σ = 34338960. Its totient is φ = 22273344.

The previous prime is 28228729. The next prime is 28228741. The reversal of 28228735 is 53782282.

It is an interprime number because it is at equal distance from previous prime (28228729) and next prime (28228741).

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 28228735 - 2¹⁹ = 27704447 is a prime.

It is a super-2 number, since 2×28228735² = 1593722959400450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28228694 and 28228703.

It is a congruent number.

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, 38305 + ... + 39034.

It is an arithmetic number, because the mean of its divisors is an integer number (4292370).

Almost surely, 2^28228735 is an apocalyptic number.

28228735 is a deficient number, since it is larger than the sum of its proper divisors (6110225).

28228735 is an equidigital number, since it uses as much as digits as its factorization.

28228735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77417.

The product of its digits is 53760, while the sum is 37.

The square root of 28228735 is about 5313.0720868439. The cubic root of 28228735 is about 304.4835297654.

The spelling of 28228735 in words is "twenty-eight million, two hundred twenty-eight thousand, seven hundred thirty-five".