27478673280 has 384 divisors, whose sum is σ = 99365666400. Its totient is φ = 7255941120.

The previous prime is 27478673279. The next prime is 27478673293. The reversal of 27478673280 is 8237687472.

27478673280 is a `hidden beast` number, since 2 + 7 + 478 + 67 + 32 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16950870 + ... + 16952490.

Almost surely, 2^27478673280 is an apocalyptic number.

27478673280 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 27478673280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49682833200).

27478673280 is an abundant number, since it is smaller than the sum of its proper divisors (71886993120).

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

27478673280 is a wasteful number, since it uses less digits than its factorization.

27478673280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 54.

The spelling of 27478673280 in words is "twenty-seven billion, four hundred seventy-eight million, six hundred seventy-three thousand, two hundred eighty".