28401344 has 14 divisors (see below), whose sum is σ = 56359044. Its totient is φ = 14200640.

The previous prime is 28401341. The next prime is 28401379. The reversal of 28401344 is 44310482.

It is not an unprimeable number, because it can be changed into a prime (28401341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221822 + ... + 221949.

It is an arithmetic number, because the mean of its divisors is an integer number (4025646).

Almost surely, 2^28401344 is an apocalyptic number.

It is an amenable number.

28401344 is a deficient number, since it is larger than the sum of its proper divisors (27957700).

28401344 is an equidigital number, since it uses as much as digits as its factorization.

28401344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443783 (or 443773 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 28401344 is about 5329.2911348509. The cubic root of 28401344 is about 305.1028731186.

The spelling of 28401344 in words is "twenty-eight million, four hundred one thousand, three hundred forty-four".