28636536 has 64 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 9147008.

The previous prime is 28636507. The next prime is 28636561. The reversal of 28636536 is 63563682.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28636494 and 28636503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59545 + ... + 60023.

It is an arithmetic number, because the mean of its divisors is an integer number (1166400).

Almost surely, 2^28636536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28636536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37324800).

28636536 is an abundant number, since it is smaller than the sum of its proper divisors (46013064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28636536 is a wasteful number, since it uses less digits than its factorization.

28636536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 584 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

The square root of 28636536 is about 5351.3116149221. The cubic root of 28636536 is about 305.9427463476.

The spelling of 28636536 in words is "twenty-eight million, six hundred thirty-six thousand, five hundred thirty-six".