28158442480 has 160 divisors (see below), whose sum is σ = 76855080960. Its totient is φ = 9393162240.

The previous prime is 28158442463. The next prime is 28158442513. The reversal of 28158442480 is 8424485182.

It is a self number, because there is not a number n which added to its sum of digits gives 28158442480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9618777 + ... + 9621703.

It is an arithmetic number, because the mean of its divisors is an integer number (480344256).

Almost surely, 2^28158442480 is an apocalyptic number.

28158442480 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 28158442480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38427540480).

28158442480 is an abundant number, since it is smaller than the sum of its proper divisors (48696638480).

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

28158442480 is a wasteful number, since it uses less digits than its factorization.

28158442480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 46.

The spelling of 28158442480 in words is "twenty-eight billion, one hundred fifty-eight million, four hundred forty-two thousand, four hundred eighty".