28264231137280 has 104 divisors (see below), whose sum is σ = 67939135524000. Its totient is φ = 11286813278208.

The previous prime is 28264231137119. The next prime is 28264231137343. The reversal of 28264231137280 is 8273113246282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11115526 + ... + 13419514.

It is an arithmetic number, because the mean of its divisors is an integer number (653260918500).

Almost surely, 2^{28264231137280} is an apocalyptic number.

28264231137280 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 28264231137280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33969567762000).

28264231137280 is an abundant number, since it is smaller than the sum of its proper divisors (39674904386720).

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

28264231137280 is an equidigital number, since it uses as much as digits as its factorization.

28264231137280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304617 (or 2304595 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 28264231137280 in words is "twenty-eight trillion, two hundred sixty-four billion, two hundred thirty-one million, one hundred thirty-seven thousand, two hundred eighty".