28161686480 has 40 divisors (see below), whose sum is σ = 66585693600. Its totient is φ = 11073746048.

The previous prime is 28161686459. The next prime is 28161686533. The reversal of 28161686480 is 8468616182.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 2978510 + ... + 2987949.

It is an arithmetic number, because the mean of its divisors is an integer number (1664642340).

Almost surely, 2^28161686480 is an apocalyptic number.

28161686480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28161686480 is an abundant number, since it is smaller than the sum of its proper divisors (38424007120).

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

28161686480 is a wasteful number, since it uses less digits than its factorization.

28161686480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966531 (or 5966525 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 28161686480 in words is "twenty-eight billion, one hundred sixty-one million, six hundred eighty-six thousand, four hundred eighty".