28090023 has 8 divisors (see below), whose sum is σ = 40334448. Its totient is φ = 17286144.

The previous prime is 28090021. The next prime is 28090031. The reversal of 28090023 is 32009082.

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

It is not a de Polignac number, because 28090023 - 2¹ = 28090021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28089975 and 28090002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28090021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360090 + ... + 360167.

It is an arithmetic number, because the mean of its divisors is an integer number (5041806).

Almost surely, 2^28090023 is an apocalyptic number.

28090023 is a deficient number, since it is larger than the sum of its proper divisors (12244425).

28090023 is a wasteful number, since it uses less digits than its factorization.

28090023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720273.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 28090023 is about 5300.0021698109. The cubic root of 28090023 is about 303.9839810061.

The spelling of 28090023 in words is "twenty-eight million, ninety thousand, twenty-three".