28481132 has 12 divisors (see below), whose sum is σ = 51560880. Its totient is φ = 13749456.

The previous prime is 28481119. The next prime is 28481149. The reversal of 28481132 is 23118482.

It is a super-2 number, since 2×28481132² = 1622349760002848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 28481095 and 28481104.

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 3 ways as a sum of consecutive naturals, for example, 122648 + ... + 122879.

It is an arithmetic number, because the mean of its divisors is an integer number (4296740).

Almost surely, 2^28481132 is an apocalyptic number.

It is an amenable number.

28481132 is a deficient number, since it is larger than the sum of its proper divisors (23079748).

28481132 is a wasteful number, since it uses less digits than its factorization.

28481132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245560 (or 245558 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 28481132 is about 5336.7716833307. The cubic root of 28481132 is about 305.3883148617.

The spelling of 28481132 in words is "twenty-eight million, four hundred eighty-one thousand, one hundred thirty-two".