28923636 has 48 divisors (see below), whose sum is σ = 77901824. Its totient is φ = 8181216.

The previous prime is 28923617. The next prime is 28923667. The reversal of 28923636 is 63632982.

28923636 is a modest number, since divided by 3636 gives 2892 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28923594 and 28923603.

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, 6981 + ... + 10323.

Almost surely, 2^28923636 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 28923636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38950912).

28923636 is an abundant number, since it is smaller than the sum of its proper divisors (48978188).

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

28923636 is a wasteful number, since it uses less digits than its factorization.

28923636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460 (or 3458 counting only the distinct ones).

The product of its digits is 93312, while the sum is 39.

The square root of 28923636 is about 5378.0699140119. The cubic root of 28923636 is about 306.9617737916.

The spelling of 28923636 in words is "twenty-eight million, nine hundred twenty-three thousand, six hundred thirty-six".