28889669680 has 40 divisors (see below), whose sum is σ = 67177620000. Its totient is φ = 11554295808.

The previous prime is 28889669663. The next prime is 28889669687. The reversal of 28889669680 is 8696698882.

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

It is a super-2 number, since 2×28889669680² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28889669687) by changing a digit.

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, 699856 + ... + 739984.

It is an arithmetic number, because the mean of its divisors is an integer number (1679440500).

Almost surely, 2^28889669680 is an apocalyptic number.

28889669680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28889669680 is an abundant number, since it is smaller than the sum of its proper divisors (38287950320).

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

28889669680 is a wasteful number, since it uses less digits than its factorization.

28889669680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49141 (or 49135 counting only the distinct ones).

The product of its (nonzero) digits is 143327232, while the sum is 70.

The spelling of 28889669680 in words is "twenty-eight billion, eight hundred eighty-nine million, six hundred sixty-nine thousand, six hundred eighty".