28811663608430 has 48 divisors (see below), whose sum is σ = 54358091961264. Its totient is φ = 10993199508480.

The previous prime is 28811663608397. The next prime is 28811663608477. The reversal of 28811663608430 is 3480636611882.

It is a super-2 number, since 2×28811663608430² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19939811 + ... + 21335870.

It is an arithmetic number, because the mean of its divisors is an integer number (1132460249193).

Almost surely, 2^{28811663608430} is an apocalyptic number.

28811663608430 is a deficient number, since it is larger than the sum of its proper divisors (25546428352834).

28811663608430 is a wasteful number, since it uses less digits than its factorization.

28811663608430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41275829 (or 41275800 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 28811663608430 in words is "twenty-eight trillion, eight hundred eleven billion, six hundred sixty-three million, six hundred eight thousand, four hundred thirty".