28026343638540 has 288 divisors, whose sum is σ = 92437272083520. Its totient is φ = 6832179099648.

The previous prime is 28026343638493. The next prime is 28026343638569. The reversal of 28026343638540 is 4583634362082.

28026343638540 is a `hidden beast` number, since 2 + 8 + 0 + 2 + 6 + 34 + 3 + 63 + 8 + 540 = 666.

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, 890585926 + ... + 890617394.

It is an arithmetic number, because the mean of its divisors is an integer number (320962750290).

Almost surely, 2^{28026343638540} is an apocalyptic number.

28026343638540 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 28026343638540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46218636041760).

28026343638540 is an abundant number, since it is smaller than the sum of its proper divisors (64410928444980).

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

28026343638540 is a wasteful number, since it uses less digits than its factorization.

28026343638540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35161 (or 35156 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 54.

The spelling of 28026343638540 in words is "twenty-eight trillion, twenty-six billion, three hundred forty-three million, six hundred thirty-eight thousand, five hundred forty".