28481936 has 60 divisors (see below), whose sum is σ = 68001228. Its totient is φ = 11483136.

The previous prime is 28481933. The next prime is 28481939. The reversal of 28481936 is 63918482.

It is an interprime number because it is at equal distance from previous prime (28481933) and next prime (28481939).

It can be written as a sum of positive squares in 2 ways, for example, as 10368400 + 18113536 = 3220^2 + 4256^2 .

It is a super-3 number, since 3×28481936³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 28481893 and 28481902.

It is not an unprimeable number, because it can be changed into a prime (28481933) 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 11 ways as a sum of consecutive naturals, for example, 12260 + ... + 14396.

Almost surely, 2^28481936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28481936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34000614).

28481936 is an abundant number, since it is smaller than the sum of its proper divisors (39519292).

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

28481936 is a wasteful number, since it uses less digits than its factorization.

28481936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176 (or 2163 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 28481936 is about 5336.8470092368. The cubic root of 28481936 is about 305.3911884588.

The spelling of 28481936 in words is "twenty-eight million, four hundred eighty-one thousand, nine hundred thirty-six".