28357687756 has 24 divisors (see below), whose sum is σ = 49730236416. Its totient is φ = 14149082640.

The previous prime is 28357687727. The next prime is 28357687793. The reversal of 28357687756 is 65778675382.

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, 4518901 + ... + 4525171.

It is an arithmetic number, because the mean of its divisors is an integer number (2072093184).

Almost surely, 2^28357687756 is an apocalyptic number.

It is an amenable number.

28357687756 is a deficient number, since it is larger than the sum of its proper divisors (21372548660).

28357687756 is a wasteful number, since it uses less digits than its factorization.

28357687756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469 (or 8467 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 64.

The spelling of 28357687756 in words is "twenty-eight billion, three hundred fifty-seven million, six hundred eighty-seven thousand, seven hundred fifty-six".