27912355840 has 240 divisors, whose sum is σ = 71720409600. Its totient is φ = 10397417472.

The previous prime is 27912355789. The next prime is 27912355903. The reversal of 27912355840 is 4855321972.

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, 122961807 + ... + 122962033.

It is an arithmetic number, because the mean of its divisors is an integer number (298835040).

Almost surely, 2^27912355840 is an apocalyptic number.

27912355840 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 27912355840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35860204800).

27912355840 is an abundant number, since it is smaller than the sum of its proper divisors (43808053760).

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

27912355840 is an equidigital number, since it uses as much as digits as its factorization.

27912355840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 27912355840 in words is "twenty-seven billion, nine hundred twelve million, three hundred fifty-five thousand, eight hundred forty".