28811424 has 24 divisors (see below), whose sum is σ = 75630240. Its totient is φ = 9603776.

The previous prime is 28811401. The next prime is 28811441. The reversal of 28811424 is 42411882.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28811391 and 28811400.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 149964 + ... + 150155.

It is an arithmetic number, because the mean of its divisors is an integer number (3151260).

Almost surely, 2^28811424 is an apocalyptic number.

28811424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28811424 is an abundant number, since it is smaller than the sum of its proper divisors (46818816).

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

28811424 is a wasteful number, since it uses less digits than its factorization.

28811424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300132 (or 300124 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 28811424 is about 5367.6274088279. The cubic root of 28811424 is about 306.5642968542.

The spelling of 28811424 in words is "twenty-eight million, eight hundred eleven thousand, four hundred twenty-four".