28238232 has 32 divisors (see below), whose sum is σ = 77014080. Its totient is φ = 8556960.

The previous prime is 28238201. The next prime is 28238233. The reversal of 28238232 is 23283282.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28238232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28238233) 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, 53218 + ... + 53745.

It is an arithmetic number, because the mean of its divisors is an integer number (2406690).

Almost surely, 2^28238232 is an apocalyptic number.

28238232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28238232 is an abundant number, since it is smaller than the sum of its proper divisors (48775848).

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

28238232 is a wasteful number, since it uses less digits than its factorization.

28238232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106983 (or 106979 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 28238232 is about 5313.9657507364. The cubic root of 28238232 is about 304.5176717589.

The spelling of 28238232 in words is "twenty-eight million, two hundred thirty-eight thousand, two hundred thirty-two".