28345446 has 12 divisors (see below), whose sum is σ = 61415172. Its totient is φ = 9448476.

The previous prime is 28345433. The next prime is 28345451. The reversal of 28345446 is 64454382.

It is a self number, because there is not a number n which added to its sum of digits gives 28345446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 787356 + ... + 787391.

It is an arithmetic number, because the mean of its divisors is an integer number (5117931).

Almost surely, 2^28345446 is an apocalyptic number.

28345446 is an abundant number, since it is smaller than the sum of its proper divisors (33069726).

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

28345446 is a wasteful number, since it uses less digits than its factorization.

28345446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574755 (or 1574752 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 28345446 is about 5324.0441395616. The cubic root of 28345446 is about 304.9025792953.

The spelling of 28345446 in words is "twenty-eight million, three hundred forty-five thousand, four hundred forty-six".