28390606788 has 24 divisors (see below), whose sum is σ = 66441330592. Its totient is φ = 9435452544.

The previous prime is 28390606757. The next prime is 28390606793. The reversal of 28390606788 is 88760609382.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3506170 + ... + 3514257.

Almost surely, 2^28390606788 is an apocalyptic number.

It is an amenable number.

28390606788 is an abundant number, since it is smaller than the sum of its proper divisors (38050723804).

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

28390606788 is a wasteful number, since it uses less digits than its factorization.

28390606788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020771 (or 7020769 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 28390606788 in words is "twenty-eight billion, three hundred ninety million, six hundred six thousand, seven hundred eighty-eight".