28776472566 has 32 divisors (see below), whose sum is σ = 57966720000. Its totient is φ = 9523267200.

The previous prime is 28776472547. The next prime is 28776472573. The reversal of 28776472566 is 66527467782.

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 15 ways as a sum of consecutive naturals, for example, 1803150 + ... + 1819038.

It is an arithmetic number, because the mean of its divisors is an integer number (1811460000).

Almost surely, 2^28776472566 is an apocalyptic number.

28776472566 is an abundant number, since it is smaller than the sum of its proper divisors (29190247434).

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

28776472566 is a wasteful number, since it uses less digits than its factorization.

28776472566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18044.

The product of its digits is 47416320, while the sum is 60.

The spelling of 28776472566 in words is "twenty-eight billion, seven hundred seventy-six million, four hundred seventy-two thousand, five hundred sixty-six".