28355850 has 72 divisors (see below), whose sum is σ = 77506572. Its totient is φ = 7430400.

The previous prime is 28355843. The next prime is 28355857. The reversal of 28355850 is 5855382.

It is an interprime number because it is at equal distance from previous prime (28355843) and next prime (28355857).

It can be written as a sum of positive squares in 6 ways, for example, as 10131489 + 18224361 = 3183^2 + 4269^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28355857) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 26934 + ... + 27966.

Almost surely, 2^28355850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28355850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38753286).

28355850 is an abundant number, since it is smaller than the sum of its proper divisors (49150722).

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

28355850 is a wasteful number, since it uses less digits than its factorization.

28355850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 28355850 is about 5325.0211267187. The cubic root of 28355850 is about 304.9398788602.

The spelling of 28355850 in words is "twenty-eight million, three hundred fifty-five thousand, eight hundred fifty".