28450384 has 20 divisors (see below), whose sum is σ = 58365684. Its totient is φ = 13388288.

The previous prime is 28450327. The next prime is 28450399. The reversal of 28450384 is 48305482.

It can be written as a sum of positive squares in 2 ways, for example, as 15776784 + 12673600 = 3972^2 + 3560^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 52027 + ... + 52570.

Almost surely, 2^28450384 is an apocalyptic number.

It is an amenable number.

28450384 is an abundant number, since it is smaller than the sum of its proper divisors (29915300).

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

28450384 is a wasteful number, since it uses less digits than its factorization.

28450384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104622 (or 104616 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28450384 is about 5333.8901376013. The cubic root of 28450384 is about 305.2783770371.

The spelling of 28450384 in words is "twenty-eight million, four hundred fifty thousand, three hundred eighty-four".