28755023788 has 12 divisors (see below), whose sum is σ = 50336764632. Its totient is φ = 14373091040.

The previous prime is 28755023783. The next prime is 28755023819. The reversal of 28755023788 is 88732055782.

It is not an unprimeable number, because it can be changed into a prime (28755023783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090558 + ... + 1116613.

It is an arithmetic number, because the mean of its divisors is an integer number (4194730386).

Almost surely, 2^28755023788 is an apocalyptic number.

It is an amenable number.

28755023788 is a deficient number, since it is larger than the sum of its proper divisors (21581740844).

28755023788 is a wasteful number, since it uses less digits than its factorization.

28755023788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210432 (or 2210430 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 28755023788 in words is "twenty-eight billion, seven hundred fifty-five million, twenty-three thousand, seven hundred eighty-eight".