27726459840 has 224 divisors, whose sum is σ = 102961440000. Its totient is φ = 7004537856.

The previous prime is 27726459811. The next prime is 27726459857. The reversal of 27726459840 is 4895462772.

27726459840 is a `hidden beast` number, since 2 + 7 + 7 + 2 + 6 + 4 + 598 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 79711 + ... + 248609.

Almost surely, 2^27726459840 is an apocalyptic number.

27726459840 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 27726459840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51480720000).

27726459840 is an abundant number, since it is smaller than the sum of its proper divisors (75234980160).

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

27726459840 is a wasteful number, since it uses less digits than its factorization.

27726459840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168944 (or 168928 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 27726459840 in words is "twenty-seven billion, seven hundred twenty-six million, four hundred fifty-nine thousand, eight hundred forty".