28431028080 has 640 divisors, whose sum is σ = 121725542400. Its totient is φ = 5939122176.

The previous prime is 28431028079. The next prime is 28431028117. The reversal of 28431028080 is 8082013482.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21424377 + ... + 21425703.

It is an arithmetic number, because the mean of its divisors is an integer number (190196160).

Almost surely, 2^28431028080 is an apocalyptic number.

28431028080 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 28431028080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60862771200).

28431028080 is an abundant number, since it is smaller than the sum of its proper divisors (93294514320).

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

28431028080 is a wasteful number, since it uses less digits than its factorization.

28431028080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 28431028080 in words is "twenty-eight billion, four hundred thirty-one million, twenty-eight thousand, eighty".