28112435240 has 64 divisors (see below), whose sum is σ = 65265177600. Its totient is φ = 10892187648.

The previous prime is 28112435171. The next prime is 28112435261. The reversal of 28112435240 is 4253421182.

It is a junction number, because it is equal to n+sod(n) for n = 28112435197 and 28112435206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105281 + ... + 259439.

It is an arithmetic number, because the mean of its divisors is an integer number (1019768400).

Almost surely, 2^28112435240 is an apocalyptic number.

28112435240 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 28112435240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32632588800).

28112435240 is an abundant number, since it is smaller than the sum of its proper divisors (37152742360).

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

28112435240 is a wasteful number, since it uses less digits than its factorization.

28112435240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154314 (or 154310 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 28112435240 in words is "twenty-eight billion, one hundred twelve million, four hundred thirty-five thousand, two hundred forty".