28418550 has 96 divisors (see below), whose sum is σ = 74995200. Its totient is φ = 7109760.

The previous prime is 28418513. The next prime is 28418569. The reversal of 28418550 is 5581482.

It is a super-2 number, since 2×28418550² = 1615227968205000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204381 + ... + 204519.

It is an arithmetic number, because the mean of its divisors is an integer number (781200).

Almost surely, 2^28418550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28418550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37497600).

28418550 is an abundant number, since it is smaller than the sum of its proper divisors (46576650).

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

28418550 is a wasteful number, since it uses less digits than its factorization.

28418550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 28418550 is about 5330.9051764217. The cubic root of 28418550 is about 305.1644727891.

The spelling of 28418550 in words is "twenty-eight million, four hundred eighteen thousand, five hundred fifty".