28590636 has 36 divisors (see below), whose sum is σ = 69115592. Its totient is φ = 9198336.

The previous prime is 28590593. The next prime is 28590673. The reversal of 28590636 is 63609582.

It is a junction number, because it is equal to n+sod(n) for n = 28590594 and 28590603.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8676 + ... + 11508.

Almost surely, 2^28590636 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 28590636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34557796).

28590636 is an abundant number, since it is smaller than the sum of its proper divisors (40524956).

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

28590636 is a wasteful number, since it uses less digits than its factorization.

28590636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898 (or 2867 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 28590636 is about 5347.0212268140. The cubic root of 28590636 is about 305.7791990811.

The spelling of 28590636 in words is "twenty-eight million, five hundred ninety thousand, six hundred thirty-six".