27438444 has 54 divisors (see below), whose sum is σ = 76248900. Its totient is φ = 8313360.

The previous prime is 27438431. The next prime is 27438469. The reversal of 27438444 is 44483472.

It is a happy number.

27438444 is a `hidden beast` number, since 274 + 384 + 4 + 4 = 666.

It is a super-2 number, since 2×27438444² = 1505736418282272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 27438399 and 27438408.

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 17 ways as a sum of consecutive naturals, for example, 1207 + ... + 7505.

Almost surely, 2^27438444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27438444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38124450).

27438444 is an abundant number, since it is smaller than the sum of its proper divisors (48810456).

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

27438444 is a wasteful number, since it uses less digits than its factorization.

27438444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331 (or 6315 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

The square root of 27438444 is about 5238.1718184878. The cubic root of 27438444 is about 301.6151553056.

The spelling of 27438444 in words is "twenty-seven million, four hundred thirty-eight thousand, four hundred forty-four".