28481361 has 8 divisors (see below), whose sum is σ = 39973920. Its totient is φ = 17988192.

The previous prime is 28481359. The next prime is 28481363. The reversal of 28481361 is 16318482.

It is an interprime number because it is at equal distance from previous prime (28481359) and next prime (28481363).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28481361 - 2¹ = 28481359 is a prime.

It is a super-2 number, since 2×28481361² = 1622375848824642, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28481363) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 249780 + ... + 249893.

It is an arithmetic number, because the mean of its divisors is an integer number (4996740).

Almost surely, 2^28481361 is an apocalyptic number.

It is an amenable number.

28481361 is a deficient number, since it is larger than the sum of its proper divisors (11492559).

28481361 is a wasteful number, since it uses less digits than its factorization.

28481361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499695.

The product of its digits is 9216, while the sum is 33.

The square root of 28481361 is about 5336.7931382058. The cubic root of 28481361 is about 305.3891333420.

The spelling of 28481361 in words is "twenty-eight million, four hundred eighty-one thousand, three hundred sixty-one".