28655587950787 has 6 divisors (see below), whose sum is σ = 33334051289748. Its totient is φ = 24561932529204.

The previous prime is 28655587950719. The next prime is 28655587950791. The reversal of 28655587950787 is 78705978555682.

It is a de Polignac number, because none of the positive numbers 2^k-28655587950787 is a prime.

It is a super-2 number, since 2×28655587950787² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28655587950787.

It is not an unprimeable number, because it can be changed into a prime (28655587950887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 292403958633 + ... + 292403958730.

It is an arithmetic number, because the mean of its divisors is an integer number (5555675214958).

Almost surely, 2^{28655587950787} is an apocalyptic number.

28655587950787 is a deficient number, since it is larger than the sum of its proper divisors (4678463338961).

28655587950787 is an equidigital number, since it uses as much as digits as its factorization.

28655587950787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584807917377 (or 584807917370 counting only the distinct ones).

The product of its (nonzero) digits is 11854080000, while the sum is 82.

The spelling of 28655587950787 in words is "twenty-eight trillion, six hundred fifty-five billion, five hundred eighty-seven million, nine hundred fifty thousand, seven hundred eighty-seven".