28657436 has 12 divisors (see below), whose sum is σ = 51317112. Its totient is φ = 13995408.

The previous prime is 28657331. The next prime is 28657439. The reversal of 28657436 is 63475682.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28657393 and 28657402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28657439) 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 3 ways as a sum of consecutive naturals, for example, 83135 + ... + 83478.

It is an arithmetic number, because the mean of its divisors is an integer number (4276426).

Almost surely, 2^28657436 is an apocalyptic number.

It is an amenable number.

28657436 is a deficient number, since it is larger than the sum of its proper divisors (22659676).

28657436 is a wasteful number, since it uses less digits than its factorization.

28657436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166660 (or 166658 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 28657436 is about 5353.2640510253. The cubic root of 28657436 is about 306.0171576806.

It can be divided in two parts, 2865 and 7436, that added together give a palindrome (10301).

The spelling of 28657436 in words is "twenty-eight million, six hundred fifty-seven thousand, four hundred thirty-six".