28086994 has 8 divisors (see below), whose sum is σ = 45371340. Its totient is φ = 12963216.

The previous prime is 28086991. The next prime is 28087001. The reversal of 28086994 is 49968082.

It can be written as a sum of positive squares in 2 ways, for example, as 27615025 + 471969 = 5255^2 + 687^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28086991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540109 + ... + 540160.

Almost surely, 2^28086994 is an apocalyptic number.

28086994 is a deficient number, since it is larger than the sum of its proper divisors (17284346).

28086994 is a wasteful number, since it uses less digits than its factorization.

28086994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080284.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 28086994 is about 5299.7164075071. The cubic root of 28086994 is about 303.9730542252.

The spelling of 28086994 in words is "twenty-eight million, eighty-six thousand, nine hundred ninety-four".