28090834 has 8 divisors (see below), whose sum is σ = 44614908. Its totient is φ = 13219200.

The previous prime is 28090831. The next prime is 28090837. The reversal of 28090834 is 43809082.

It is an interprime number because it is at equal distance from previous prime (28090831) and next prime (28090837).

It can be written as a sum of positive squares in 2 ways, for example, as 23668225 + 4422609 = 4865^2 + 2103^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 826201 = 28090834 / (2 + 8 + 0 + 9 + 0 + 8 + 3 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 28090834.

It is not an unprimeable number, because it can be changed into a prime (28090831) 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, 413067 + ... + 413134.

Almost surely, 2^28090834 is an apocalyptic number.

28090834 is a deficient number, since it is larger than the sum of its proper divisors (16524074).

28090834 is a wasteful number, since it uses less digits than its factorization.

28090834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826220.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28090834 is about 5300.0786786613. The cubic root of 28090834 is about 303.9869064651.

The spelling of 28090834 in words is "twenty-eight million, ninety thousand, eight hundred thirty-four".