27805826040 has 128 divisors (see below), whose sum is σ = 85357532160. Its totient is φ = 7243052544.

The previous prime is 27805826017. The next prime is 27805826101. The reversal of 27805826040 is 4062850872.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27805825983 and 27805826001.

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, 3080574 + ... + 3089586.

It is an arithmetic number, because the mean of its divisors is an integer number (666855720).

Almost surely, 2^27805826040 is an apocalyptic number.

27805826040 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 27805826040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42678766080).

27805826040 is an abundant number, since it is smaller than the sum of its proper divisors (57551706120).

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

27805826040 is a wasteful number, since it uses less digits than its factorization.

27805826040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621 (or 9617 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 27805826040 in words is "twenty-seven billion, eight hundred five million, eight hundred twenty-six thousand, forty".