27912005440 has 56 divisors (see below), whose sum is σ = 72507786912. Its totient is φ = 10149818880.

The previous prime is 27912005431. The next prime is 27912005453. The reversal of 27912005440 is 4450021972.

It is a junction number, because it is equal to n+sod(n) for n = 27912005396 and 27912005405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3961254 + ... + 3968293.

Almost surely, 2^27912005440 is an apocalyptic number.

27912005440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27912005440 is an abundant number, since it is smaller than the sum of its proper divisors (44595781472).

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

27912005440 is a wasteful number, since it uses less digits than its factorization.

27912005440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7929575 (or 7929565 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 27912005440 in words is "twenty-seven billion, nine hundred twelve million, five thousand, four hundred forty".