28423338 has 8 divisors (see below), whose sum is σ = 56846688. Its totient is φ = 9474444.

The previous prime is 28423333. The next prime is 28423349. The reversal of 28423338 is 83332482.

It is a sphenic number, since it is the product of 3 distinct primes.

28423338 is an admirable number.

It is a super-2 number, since 2×28423338² = 1615772286124488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28423299 and 28423308.

It is not an unprimeable number, because it can be changed into a prime (28423333) 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 3 ways as a sum of consecutive naturals, for example, 2368606 + ... + 2368617.

It is an arithmetic number, because the mean of its divisors is an integer number (7105836).

Almost surely, 2^28423338 is an apocalyptic number.

28423338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28423338 is a wasteful number, since it uses less digits than its factorization.

28423338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737228.

The product of its digits is 27648, while the sum is 33.

The square root of 28423338 is about 5331.3542369646. The cubic root of 28423338 is about 305.1816100163.

The spelling of 28423338 in words is "twenty-eight million, four hundred twenty-three thousand, three hundred thirty-eight".