27212803440 has 80 divisors (see below), whose sum is σ = 84503841408. Its totient is φ = 7244347648.

The previous prime is 27212803427. The next prime is 27212803451. The reversal of 27212803440 is 4430821272.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 44299 + ... + 237461.

Almost surely, 2^27212803440 is an apocalyptic number.

27212803440 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 27212803440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42251920704).

27212803440 is an abundant number, since it is smaller than the sum of its proper divisors (57291037968).

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

27212803440 is a wasteful number, since it uses less digits than its factorization.

27212803440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193766 (or 193760 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 27212803440 in words is "twenty-seven billion, two hundred twelve million, eight hundred three thousand, four hundred forty".