27999456 has 24 divisors (see below), whose sum is σ = 73498824. Its totient is φ = 9333120.

The previous prime is 27999443. The next prime is 27999463. The reversal of 27999456 is 65499972.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 27999399 and 27999408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145735 + ... + 145926.

It is an arithmetic number, because the mean of its divisors is an integer number (3062451).

Almost surely, 2^27999456 is an apocalyptic number.

It is an amenable number.

27999456 is an abundant number, since it is smaller than the sum of its proper divisors (45499368).

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

27999456 is a wasteful number, since it uses less digits than its factorization.

27999456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291674 (or 291666 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 51.

The square root of 27999456 is about 5291.4512187112. The cubic root of 27999456 is about 303.6569306220.

The spelling of 27999456 in words is "twenty-seven million, nine hundred ninety-nine thousand, four hundred fifty-six".