28677543421000 has 128 divisors (see below), whose sum is σ = 67892217120000. Its totient is φ = 11336652096000.

The previous prime is 28677543420973. The next prime is 28677543421031. The reversal of 28677543421000 is 12434577682.

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 31 ways as a sum of consecutive naturals, for example, 186734245 + ... + 186887755.

It is an arithmetic number, because the mean of its divisors is an integer number (530407946250).

Almost surely, 2^{28677543421000} is an apocalyptic number.

28677543421000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28677543421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33946108560000).

28677543421000 is an abundant number, since it is smaller than the sum of its proper divisors (39214673699000).

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

28677543421000 is a wasteful number, since it uses less digits than its factorization.

28677543421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155720 (or 155706 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 49.

Adding to 28677543421000 its reverse (12434577682), we get a palindrome (28689977998682).

The spelling of 28677543421000 in words is "twenty-eight trillion, six hundred seventy-seven billion, five hundred forty-three million, four hundred twenty-one thousand".