28436481 has 16 divisors (see below), whose sum is σ = 42436800. Its totient is φ = 18818784.

The previous prime is 28436467. The next prime is 28436519. The reversal of 28436481 is 18463482.

28436481 is a `hidden beast` number, since 2 + 8 + 4 + 3 + 648 + 1 = 666.

28436481 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 28436481 - 2⁹ = 28435969 is a prime.

It is a super-2 number, since 2×28436481² = 1617266903326722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28436981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36 + ... + 7541.

It is an arithmetic number, because the mean of its divisors is an integer number (2652300).

Almost surely, 2^28436481 is an apocalyptic number.

It is an amenable number.

28436481 is a deficient number, since it is larger than the sum of its proper divisors (14000319).

28436481 is a wasteful number, since it uses less digits than its factorization.

28436481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725 (or 7719 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 28436481 is about 5332.5867081558. The cubic root of 28436481 is about 305.2286416003.

The spelling of 28436481 in words is "twenty-eight million, four hundred thirty-six thousand, four hundred eighty-one".