28809424 has 40 divisors (see below), whose sum is σ = 67549248. Its totient is φ = 11619840.

The previous prime is 28809419. The next prime is 28809427. The reversal of 28809424 is 42490882.

It is a super-2 number, since 2×28809424² = 1659965822423552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28809427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5662 + ... + 9469.

Almost surely, 2^28809424 is an apocalyptic number.

It is an amenable number.

28809424 is an abundant number, since it is smaller than the sum of its proper divisors (38739824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28809424 is a wasteful number, since it uses less digits than its factorization.

28809424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15163 (or 15157 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 28809424 is about 5367.4411035427. The cubic root of 28809424 is about 306.5572031080.

The spelling of 28809424 in words is "twenty-eight million, eight hundred nine thousand, four hundred twenty-four".