28242432 has 120 divisors (see below), whose sum is σ = 84900816. Its totient is φ = 9372672.

The previous prime is 28242407. The next prime is 28242449. The reversal of 28242432 is 23424282.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 = 28242396 and 28242405.

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 11 ways as a sum of consecutive naturals, for example, 124303 + ... + 124529.

Almost surely, 2^28242432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28242432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42450408).

28242432 is an abundant number, since it is smaller than the sum of its proper divisors (56658384).

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

28242432 is an frugal number, since it uses more digits than its factorization.

28242432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 232 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 28242432 is about 5314.3609211268. The cubic root of 28242432 is about 304.5327684408.

The spelling of 28242432 in words is "twenty-eight million, two hundred forty-two thousand, four hundred thirty-two".