28505344 has 36 divisors (see below), whose sum is σ = 65031904. Its totient is φ = 12215808.

The previous prime is 28505341. The next prime is 28505381. The reversal of 28505344 is 44350582.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505341) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6162 + ... + 9745.

Almost surely, 2^28505344 is an apocalyptic number.

It is an amenable number.

28505344 is an abundant number, since it is smaller than the sum of its proper divisors (36526560).

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

28505344 is an equidigital number, since it uses as much as digits as its factorization.

28505344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15930 (or 15916 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 28505344 is about 5339.0396140130. The cubic root of 28505344 is about 305.4748278980.

The spelling of 28505344 in words is "twenty-eight million, five hundred five thousand, three hundred forty-four".