28260636 has 24 divisors (see below), whose sum is σ = 66846864. Its totient is φ = 9290880.

The previous prime is 28260599. The next prime is 28260643. The reversal of 28260636 is 63606282.

It is a junction number, because it is equal to n+sod(n) for n = 28260597 and 28260606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15255 + ... + 17006.

It is an arithmetic number, because the mean of its divisors is an integer number (2785286).

Almost surely, 2^28260636 is an apocalyptic number.

It is an amenable number.

28260636 is an abundant number, since it is smaller than the sum of its proper divisors (38586228).

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

28260636 is a wasteful number, since it uses less digits than its factorization.

28260636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32341 (or 32339 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 28260636 is about 5316.0733629249. The cubic root of 28260636 is about 304.5981844769.

The spelling of 28260636 in words is "twenty-eight million, two hundred sixty thousand, six hundred thirty-six".