28450845 has 20 divisors (see below), whose sum is σ = 51001500. Its totient is φ = 15173568.

The previous prime is 28450841. The next prime is 28450859. The reversal of 28450845 is 54805482.

It can be written as a sum of positive squares in 2 ways, for example, as 4743684 + 23707161 = 2178^2 + 4869^2 .

It is not a de Polignac number, because 28450845 - 2² = 28450841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28450841) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34720 + ... + 35529.

It is an arithmetic number, because the mean of its divisors is an integer number (2550075).

Almost surely, 2^28450845 is an apocalyptic number.

It is an amenable number.

28450845 is a deficient number, since it is larger than the sum of its proper divisors (22550655).

28450845 is an equidigital number, since it uses as much as digits as its factorization.

28450845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70266 (or 70257 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 28450845 is about 5333.9333516646. The cubic root of 28450845 is about 305.2800259026.

The spelling of 28450845 in words is "twenty-eight million, four hundred fifty thousand, eight hundred forty-five".