28449805 has 8 divisors (see below), whose sum is σ = 34866432. Its totient is φ = 22275408.

The previous prime is 28449803. The next prime is 28449833. The reversal of 28449805 is 50894482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28449805 - 2¹ = 28449803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28449803) 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 7 ways as a sum of consecutive naturals, for example, 60297 + ... + 60766.

It is an arithmetic number, because the mean of its divisors is an integer number (4358304).

Almost surely, 2^28449805 is an apocalyptic number.

It is an amenable number.

28449805 is a deficient number, since it is larger than the sum of its proper divisors (6416627).

28449805 is a wasteful number, since it uses less digits than its factorization.

28449805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121115.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28449805 is about 5333.8358617415. The cubic root of 28449805 is about 305.2763060940.

The spelling of 28449805 in words is "twenty-eight million, four hundred forty-nine thousand, eight hundred five".