28793424 has 80 divisors (see below), whose sum is σ = 84708864. Its totient is φ = 8342400.

The previous prime is 28793423. The next prime is 28793431. The reversal of 28793424 is 42439782.

It is a super-2 number, since 2×28793424² = 1658122531287552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28793423) 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 15 ways as a sum of consecutive naturals, for example, 10959 + ... + 13329.

Almost surely, 2^28793424 is an apocalyptic number.

28793424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28793424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42354432).

28793424 is an abundant number, since it is smaller than the sum of its proper divisors (55915440).

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

28793424 is a wasteful number, since it uses less digits than its factorization.

28793424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416 (or 2410 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 28793424 is about 5365.9504283957. The cubic root of 28793424 is about 306.5004413166.

The spelling of 28793424 in words is "twenty-eight million, seven hundred ninety-three thousand, four hundred twenty-four".