28936481 has 8 divisors (see below), whose sum is σ = 33442560. Its totient is φ = 24523488.

The previous prime is 28936441. The next prime is 28936483. The reversal of 28936481 is 18463982.

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

It is a cyclic number.

It is not a de Polignac number, because 28936481 - 2¹⁴ = 28920097 is a prime.

It is a super-2 number, since 2×28936481² = 1674639865326722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28936483) 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 7 ways as a sum of consecutive naturals, for example, 22601 + ... + 23846.

It is an arithmetic number, because the mean of its divisors is an integer number (4180320).

Almost surely, 2^28936481 is an apocalyptic number.

It is an amenable number.

28936481 is a deficient number, since it is larger than the sum of its proper divisors (4506079).

28936481 is an equidigital number, since it uses as much as digits as its factorization.

28936481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46543.

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

The square root of 28936481 is about 5379.2639831114. The cubic root of 28936481 is about 307.0072076880.

It can be divided in two parts, 289 and 36481, that multiplied together give a square (10543009 = 3247²).

The spelling of 28936481 in words is "twenty-eight million, nine hundred thirty-six thousand, four hundred eighty-one".