28761787688 has 32 divisors (see below), whose sum is σ = 57114797760. Its totient is φ = 13531595520.

The previous prime is 28761787679. The next prime is 28761787699. The reversal of 28761787688 is 88678716782.

It is a Harshad number since it is a multiple of its sum of digits (68).

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, 573095 + ... + 621257.

It is an arithmetic number, because the mean of its divisors is an integer number (1784837430).

Almost surely, 2^28761787688 is an apocalyptic number.

It is an amenable number.

28761787688 is a deficient number, since it is larger than the sum of its proper divisors (28353010072).

28761787688 is a wasteful number, since it uses less digits than its factorization.

28761787688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52577 (or 52573 counting only the distinct ones).

The product of its digits is 101154816, while the sum is 68.

The spelling of 28761787688 in words is "twenty-eight billion, seven hundred sixty-one million, seven hundred eighty-seven thousand, six hundred eighty-eight".