28040580240 has 160 divisors (see below), whose sum is σ = 92354446080. Its totient is φ = 7024453632.

The previous prime is 28040580173. The next prime is 28040580251. The reversal of 28040580240 is 4208504082.

It is a happy 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, 203077 + ... + 311963.

It is an arithmetic number, because the mean of its divisors is an integer number (577215288).

Almost surely, 2^28040580240 is an apocalyptic number.

28040580240 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 28040580240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46177223040).

28040580240 is an abundant number, since it is smaller than the sum of its proper divisors (64313865840).

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

28040580240 is a wasteful number, since it uses less digits than its factorization.

28040580240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108969 (or 108963 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The spelling of 28040580240 in words is "twenty-eight billion, forty million, five hundred eighty thousand, two hundred forty".