28828646880440 has 64 divisors (see below), whose sum is σ = 70762179108960. Its totient is φ = 10483002846720.

The previous prime is 28828646880421. The next prime is 28828646880443. The reversal of 28828646880440 is 4408864682882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28828646880443) 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 15 ways as a sum of consecutive naturals, for example, 35518994 + ... + 36321566.

Almost surely, 2^{28828646880440} is an apocalyptic number.

28828646880440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28828646880440 is an abundant number, since it is smaller than the sum of its proper divisors (41933532228520).

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

28828646880440 is a wasteful number, since it uses less digits than its factorization.

28828646880440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884232 (or 884228 counting only the distinct ones).

The product of its (nonzero) digits is 301989888, while the sum is 68.

The spelling of 28828646880440 in words is "twenty-eight trillion, eight hundred twenty-eight billion, six hundred forty-six million, eight hundred eighty thousand, four hundred forty".