28068290 has 8 divisors (see below), whose sum is σ = 50522940. Its totient is φ = 11227312.

The previous prime is 28068277. The next prime is 28068307. The reversal of 28068290 is 9286082.

It can be written as a sum of positive squares in 2 ways, for example, as 28015849 + 52441 = 5293^2 + 229^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28068290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403405 + ... + 1403424.

Almost surely, 2^28068290 is an apocalyptic number.

28068290 is a deficient number, since it is larger than the sum of its proper divisors (22454650).

28068290 is a wasteful number, since it uses less digits than its factorization.

28068290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806836.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28068290 is about 5297.9514909067. The cubic root of 28068290 is about 303.9055642151.

The spelling of 28068290 in words is "twenty-eight million, sixty-eight thousand, two hundred ninety".