28461660887 has 8 divisors (see below), whose sum is σ = 31050345600. Its totient is φ = 25873186360.

The previous prime is 28461660881. The next prime is 28461660919. The reversal of 28461660887 is 78806616482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28461660887 - 2¹⁸ = 28461398743 is a prime.

It is a super-2 number, since 2×28461660887² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28461660881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400364 + ... + 466062.

It is an arithmetic number, because the mean of its divisors is an integer number (3881293200).

Almost surely, 2^28461660887 is an apocalyptic number.

28461660887 is a deficient number, since it is larger than the sum of its proper divisors (2588684713).

28461660887 is a wasteful number, since it uses less digits than its factorization.

28461660887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105093.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 28461660887 in words is "twenty-eight billion, four hundred sixty-one million, six hundred sixty thousand, eight hundred eighty-seven".