28929636 has 48 divisors (see below), whose sum is σ = 75951680. Its totient is φ = 9640296.

The previous prime is 28929623. The next prime is 28929643. The reversal of 28929636 is 63692982.

28929636 is a `hidden beast` number, since 2 + 8 + 9 + 2 + 9 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28929591 and 28929600.

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, 7095 + ... + 10401.

Almost surely, 2^28929636 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 28929636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37975840).

28929636 is an abundant number, since it is smaller than the sum of its proper divisors (47022044).

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

28929636 is an equidigital number, since it uses as much as digits as its factorization.

28929636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332 (or 3312 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 28929636 is about 5378.6277060232. The cubic root of 28929636 is about 306.9829979939.

The spelling of 28929636 in words is "twenty-eight million, nine hundred twenty-nine thousand, six hundred thirty-six".