28618136436 has 24 divisors (see below), whose sum is σ = 66783409504. Its totient is φ = 9538270560.

The previous prime is 28618136429. The next prime is 28618136453. The reversal of 28618136436 is 63463181682.

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, 27370 + ... + 240801.

Almost surely, 2^28618136436 is an apocalyptic number.

It is an amenable number.

28618136436 is an abundant number, since it is smaller than the sum of its proper divisors (38165273068).

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

28618136436 is a wasteful number, since it uses less digits than its factorization.

28618136436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277071 (or 277069 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The spelling of 28618136436 in words is "twenty-eight billion, six hundred eighteen million, one hundred thirty-six thousand, four hundred thirty-six".