28864090 has 8 divisors (see below), whose sum is σ = 51955380. Its totient is φ = 11545632.

The previous prime is 28864049. The next prime is 28864091. The reversal of 28864090 is 9046882.

It can be written as a sum of positive squares in 2 ways, for example, as 28015849 + 848241 = 5293^2 + 921^2 .

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 (28864091) 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, 1443195 + ... + 1443214.

Almost surely, 2^28864090 is an apocalyptic number.

28864090 is a deficient number, since it is larger than the sum of its proper divisors (23091290).

28864090 is a wasteful number, since it uses less digits than its factorization.

28864090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886416.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 28864090 is about 5372.5310608688. The cubic root of 28864090 is about 306.7509784459.

The spelling of 28864090 in words is "twenty-eight million, eight hundred sixty-four thousand, ninety".