28093684 has 6 divisors (see below), whose sum is σ = 49163954. Its totient is φ = 14046840.

The previous prime is 28093679. The next prime is 28093687. The reversal of 28093684 is 48639082.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 2490084 = 5060^2 + 1578^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28093687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3511707 + ... + 3511714.

Almost surely, 2^28093684 is an apocalyptic number.

It is an amenable number.

28093684 is a deficient number, since it is larger than the sum of its proper divisors (21070270).

28093684 is a wasteful number, since it uses less digits than its factorization.

28093684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7023425 (or 7023423 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 28093684 is about 5300.3475357754. The cubic root of 28093684 is about 303.9971866083.

The spelling of 28093684 in words is "twenty-eight million, ninety-three thousand, six hundred eighty-four".