28424238 has 32 divisors (see below), whose sum is σ = 60549120. Its totient is φ = 8864640.

The previous prime is 28424233. The next prime is 28424243. The reversal of 28424238 is 83242482.

It is an interprime number because it is at equal distance from previous prime (28424233) and next prime (28424243).

It is a junction number, because it is equal to n+sod(n) for n = 28424199 and 28424208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28424233) 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, 18753 + ... + 20211.

It is an arithmetic number, because the mean of its divisors is an integer number (1892160).

Almost surely, 2^28424238 is an apocalyptic number.

28424238 is an abundant number, since it is smaller than the sum of its proper divisors (32124882).

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

28424238 is a wasteful number, since it uses less digits than its factorization.

28424238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672.

The product of its digits is 24576, while the sum is 33.

The square root of 28424238 is about 5331.4386426180. The cubic root of 28424238 is about 305.1848310847.

The spelling of 28424238 in words is "twenty-eight million, four hundred twenty-four thousand, two hundred thirty-eight".