28709934666 has 48 divisors (see below), whose sum is σ = 67032437760. Its totient is φ = 8173623360.

The previous prime is 28709934637. The next prime is 28709934707. The reversal of 28709934666 is 66643990782.

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, 91146 + ... + 256373.

It is an arithmetic number, because the mean of its divisors is an integer number (1396509120).

Almost surely, 2^28709934666 is an apocalyptic number.

28709934666 is an abundant number, since it is smaller than the sum of its proper divisors (38322503094).

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

28709934666 is a wasteful number, since it uses less digits than its factorization.

28709934666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347819 (or 347812 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 60.

The spelling of 28709934666 in words is "twenty-eight billion, seven hundred nine million, nine hundred thirty-four thousand, six hundred sixty-six".