28229424 has 20 divisors (see below), whose sum is σ = 72926136. Its totient is φ = 9409792.

The previous prime is 28229419. The next prime is 28229429. The reversal of 28229424 is 42492282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28229419) and next prime (28229429).

It is not an unprimeable number, because it can be changed into a prime (28229429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294009 + ... + 294104.

Almost surely, 2^28229424 is an apocalyptic number.

28229424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28229424 is an abundant number, since it is smaller than the sum of its proper divisors (44696712).

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

28229424 is a wasteful number, since it uses less digits than its factorization.

28229424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588124 (or 588118 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 28229424 is about 5313.1369265247. The cubic root of 28229424 is about 304.4860069982.

It can be divided in two parts, 2822 and 9424, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 28229424 in words is "twenty-eight million, two hundred twenty-nine thousand, four hundred twenty-four".