28239469 has 8 divisors (see below), whose sum is σ = 29884032. Its totient is φ = 26629680.

The previous prime is 28239467. The next prime is 28239487. The reversal of 28239469 is 96493282.

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 28239469 - 2¹ = 28239467 is a prime.

It is a super-2 number, since 2×28239469² = 1594935218803922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28239467) 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, 7014 + ... + 10279.

It is an arithmetic number, because the mean of its divisors is an integer number (3735504).

Almost surely, 2^28239469 is an apocalyptic number.

It is an amenable number.

28239469 is a deficient number, since it is larger than the sum of its proper divisors (1644563).

28239469 is a wasteful number, since it uses less digits than its factorization.

28239469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17387.

The product of its digits is 186624, while the sum is 43.

The square root of 28239469 is about 5314.0821408781. The cubic root of 28239469 is about 304.5221182467.

The spelling of 28239469 in words is "twenty-eight million, two hundred thirty-nine thousand, four hundred sixty-nine".