28066328103240 has 384 divisors, whose sum is σ = 105858949248000. Its totient is φ = 6316528103424.

The previous prime is 28066328103227. The next prime is 28066328103257. The reversal of 28066328103240 is 4230182366082.

28066328103240 is a `hidden beast` number, since 2 + 8 + 0 + 6 + 632 + 8 + 1 + 0 + 3 + 2 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53341122 + ... + 53864718.

It is an arithmetic number, because the mean of its divisors is an integer number (275674347000).

Almost surely, 2^{28066328103240} is an apocalyptic number.

28066328103240 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 28066328103240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52929474624000).

28066328103240 is an abundant number, since it is smaller than the sum of its proper divisors (77792621144760).

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

28066328103240 is a wasteful number, since it uses less digits than its factorization.

28066328103240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523949 (or 523942 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 28066328103240 in words is "twenty-eight trillion, sixty-six billion, three hundred twenty-eight million, one hundred three thousand, two hundred forty".