28364442 has 32 divisors (see below), whose sum is σ = 59389440. Its totient is φ = 9020160.

The previous prime is 28364431. The next prime is 28364461. The reversal of 28364442 is 24446382.

It is an unprimeable number.

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, 12534 + ... + 14622.

It is an arithmetic number, because the mean of its divisors is an integer number (1855920).

Almost surely, 2^28364442 is an apocalyptic number.

28364442 is an abundant number, since it is smaller than the sum of its proper divisors (31024998).

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

28364442 is a wasteful number, since it uses less digits than its factorization.

28364442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198.

The product of its digits is 36864, while the sum is 33.

The square root of 28364442 is about 5325.8278229774. The cubic root of 28364442 is about 304.9706753137.

The spelling of 28364442 in words is "twenty-eight million, three hundred sixty-four thousand, four hundred forty-two".