28090469 has 8 divisors (see below), whose sum is σ = 30942912. Its totient is φ = 25287840.

The previous prime is 28090459. The next prime is 28090471. The reversal of 28090469 is 96409082.

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

It is a cyclic number.

It is not a de Polignac number, because 28090469 - 2⁸ = 28090213 is a prime.

It is a super-2 number, since 2×28090469² = 1578148897279922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28090459) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11264 + ... + 13529.

It is an arithmetic number, because the mean of its divisors is an integer number (3867864).

Almost surely, 2^28090469 is an apocalyptic number.

It is an amenable number.

28090469 is a deficient number, since it is larger than the sum of its proper divisors (2852443).

28090469 is a wasteful number, since it uses less digits than its factorization.

28090469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24907.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28090469 is about 5300.0442450983. The cubic root of 28090469 is about 303.9855898352.

The spelling of 28090469 in words is "twenty-eight million, ninety thousand, four hundred sixty-nine".