27784279446 has 96 divisors (see below), whose sum is σ = 70334998272. Its totient is φ = 7108453440.

The previous prime is 27784279423. The next prime is 27784279447. The reversal of 27784279446 is 64497248772.

It is a self number, because there is not a number n which added to its sum of digits gives 27784279446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27784279447) by changing a digit.

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, 2067220 + ... + 2080616.

It is an arithmetic number, because the mean of its divisors is an integer number (732656232).

Almost surely, 2^27784279446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27784279446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35167499136).

27784279446 is an abundant number, since it is smaller than the sum of its proper divisors (42550718826).

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

27784279446 is a wasteful number, since it uses less digits than its factorization.

27784279446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13554 (or 13487 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 60.

The spelling of 27784279446 in words is "twenty-seven billion, seven hundred eighty-four million, two hundred seventy-nine thousand, four hundred forty-six".