27756738 has 12 divisors (see below), whose sum is σ = 60139638. Its totient is φ = 9252240.

The previous prime is 27756737. The next prime is 27756761. The reversal of 27756738 is 83765772.

It can be written as a sum of positive squares in only one way, i.e., 25674489 + 2082249 = 5067^2 + 1443^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27756693 and 27756702.

It is not an unprimeable number, because it can be changed into a prime (27756737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 771003 + ... + 771038.

Almost surely, 2^27756738 is an apocalyptic number.

27756738 is an abundant number, since it is smaller than the sum of its proper divisors (32382900).

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

27756738 is a wasteful number, since it uses less digits than its factorization.

27756738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542049 (or 1542046 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 27756738 is about 5268.4663802667. The cubic root of 27756738 is about 302.7769491983.

The spelling of 27756738 in words is "twenty-seven million, seven hundred fifty-six thousand, seven hundred thirty-eight".