28854571636 has 24 divisors (see below), whose sum is σ = 55186752096. Its totient is φ = 13091725920.

The previous prime is 28854571621. The next prime is 28854571657. The reversal of 28854571636 is 63617545882.

It is a happy number.

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, 575371 + ... + 623506.

It is an arithmetic number, because the mean of its divisors is an integer number (2299448004).

Almost surely, 2^28854571636 is an apocalyptic number.

It is an amenable number.

28854571636 is a deficient number, since it is larger than the sum of its proper divisors (26332180460).

28854571636 is a wasteful number, since it uses less digits than its factorization.

28854571636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199439 (or 1199437 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The spelling of 28854571636 in words is "twenty-eight billion, eight hundred fifty-four million, five hundred seventy-one thousand, six hundred thirty-six".