28481536 has 24 divisors (see below), whose sum is σ = 56953260. Its totient is φ = 14239744.

The previous prime is 28481501. The next prime is 28481539. The reversal of 28481536 is 63518482.

It is a happy number.

It is a super-2 number, since 2×28481536² = 1622395785838592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28481495 and 28481504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28481539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4906 + ... + 9001.

Almost surely, 2^28481536 is an apocalyptic number.

It is an amenable number.

28481536 is a deficient number, since it is larger than the sum of its proper divisors (28471724).

28481536 is an equidigital number, since it uses as much as digits as its factorization.

28481536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13929 (or 13909 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 28481536 is about 5336.8095337945. The cubic root of 28481536 is about 305.3897588153.

The spelling of 28481536 in words is "twenty-eight million, four hundred eighty-one thousand, five hundred thirty-six".