28284450 has 24 divisors (see below), whose sum is σ = 70145808. Its totient is φ = 7542480.

The previous prime is 28284439. The next prime is 28284463. The reversal of 28284450 is 5448282.

It is a happy number.

It is a super-2 number, since 2×28284450² = 1600020223605000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94132 + ... + 94431.

It is an arithmetic number, because the mean of its divisors is an integer number (2922742).

Almost surely, 2^28284450 is an apocalyptic number.

28284450 is an abundant number, since it is smaller than the sum of its proper divisors (41861358).

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

28284450 is a wasteful number, since it uses less digits than its factorization.

28284450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188578 (or 188573 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 28284450 is about 5318.3127023521. The cubic root of 28284450 is about 304.6837176388.

The spelling of 28284450 in words is "twenty-eight million, two hundred eighty-four thousand, four hundred fifty".