27708036840 has 864 divisors, whose sum is σ = 110067310080. Its totient is φ = 6031872000.

The previous prime is 27708036793. The next prime is 27708036841. The reversal of 27708036840 is 4863080772.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27708036841) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 390254005 + ... + 390254075.

It is an arithmetic number, because the mean of its divisors is an integer number (127392720).

Almost surely, 2^27708036840 is an apocalyptic number.

27708036840 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 27708036840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55033655040).

27708036840 is an abundant number, since it is smaller than the sum of its proper divisors (82359273240).

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

27708036840 is a wasteful number, since it uses less digits than its factorization.

27708036840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 27708036840 in words is "twenty-seven billion, seven hundred eight million, thirty-six thousand, eight hundred forty".