28891506992 has 10 divisors (see below), whose sum is σ = 55977294828. Its totient is φ = 14445753488.

The previous prime is 28891506979. The next prime is 28891506997. The reversal of 28891506992 is 29960519882.

It is not an unprimeable number, because it can be changed into a prime (28891506997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902859578 + ... + 902859609.

Almost surely, 2^28891506992 is an apocalyptic number.

It is an amenable number.

28891506992 is a deficient number, since it is larger than the sum of its proper divisors (27085787836).

28891506992 is a wasteful number, since it uses less digits than its factorization.

28891506992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805719195 (or 1805719189 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 28891506992 in words is "twenty-eight billion, eight hundred ninety-one million, five hundred six thousand, nine hundred ninety-two".