28810394 has 8 divisors (see below), whose sum is σ = 43259508. Its totient is φ = 14390560.

The previous prime is 28810381. The next prime is 28810447. The reversal of 28810394 is 49301882.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24870169 + 3940225 = 4987^2 + 1985^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4667 + ... + 8910.

Almost surely, 2^28810394 is an apocalyptic number.

28810394 is a deficient number, since it is larger than the sum of its proper divisors (14449114).

28810394 is a wasteful number, since it uses less digits than its factorization.

28810394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14640.

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

The square root of 28810394 is about 5367.5314624136. The cubic root of 28810394 is about 306.5606436159.

The spelling of 28810394 in words is "twenty-eight million, eight hundred ten thousand, three hundred ninety-four".