28245994 has 16 divisors (see below), whose sum is σ = 49146048. Its totient is φ = 11924352.

The previous prime is 28245983. The next prime is 28246003. The reversal of 28245994 is 49954282.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28245994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14119 + ... + 15994.

It is an arithmetic number, because the mean of its divisors is an integer number (3071628).

Almost surely, 2^28245994 is an apocalyptic number.

28245994 is a deficient number, since it is larger than the sum of its proper divisors (20900054).

28245994 is a wasteful number, since it uses less digits than its factorization.

28245994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30189.

The product of its digits is 207360, while the sum is 43.

The square root of 28245994 is about 5314.6960402266. The cubic root of 28245994 is about 304.5455706920.

The spelling of 28245994 in words is "twenty-eight million, two hundred forty-five thousand, nine hundred ninety-four".