28046305 has 16 divisors (see below), whose sum is σ = 38828160. Its totient is φ = 19049472.

The previous prime is 28046279. The next prime is 28046327. The reversal of 28046305 is 50364082.

28046305 is a nontrivial binomial coefficient, being equal to C(7490, 2).

It is a cyclic number.

It is not a de Polignac number, because 28046305 - 2¹⁷ = 27915233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 7489.

It is an arithmetic number, because the mean of its divisors is an integer number (2426760).

Almost surely, 2^28046305 is an apocalyptic number.

28046305 is the 7489-th triangular number and also the 3745-th hexagonal number.

28046305 is the 2497-th centered nonagonal number.

It is an amenable number.

28046305 is a deficient number, since it is larger than the sum of its proper divisors (10781855).

28046305 is a wasteful number, since it uses less digits than its factorization.

28046305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7608.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28046305 is about 5295.8762258950. The cubic root of 28046305 is about 303.8261969645.

The spelling of 28046305 in words is "twenty-eight million, forty-six thousand, three hundred five".