28504450 has 24 divisors (see below), whose sum is σ = 57097908. Its totient is φ = 10524480.

The previous prime is 28504447. The next prime is 28504451. The reversal of 28504450 is 5440582.

It can be written as a sum of positive squares in 6 ways, for example, as 1640961 + 26863489 = 1281^2 + 5183^2 .

It is not an unprimeable number, because it can be changed into a prime (28504451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21277 + ... + 22576.

Almost surely, 2^28504450 is an apocalyptic number.

28504450 is an abundant number, since it is smaller than the sum of its proper divisors (28593458).

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

28504450 is a wasteful number, since it uses less digits than its factorization.

28504450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43878 (or 43873 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 28504450 is about 5338.9558904340. The cubic root of 28504450 is about 305.4716343758.

The spelling of 28504450 in words is "twenty-eight million, five hundred four thousand, four hundred fifty".