27881004 has 24 divisors (see below), whose sum is σ = 65240560. Its totient is φ = 9267264.

The previous prime is 27880939. The next prime is 27881027. The reversal of 27881004 is 40018872.

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 7 ways as a sum of consecutive naturals, for example, 1362 + ... + 7590.

Almost surely, 2^27881004 is an apocalyptic number.

It is an amenable number.

27881004 is an abundant number, since it is smaller than the sum of its proper divisors (37359556).

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

27881004 is a wasteful number, since it uses less digits than its factorization.

27881004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6609 (or 6607 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 27881004 is about 5280.2465851511. The cubic root of 27881004 is about 303.2281173814.

Adding to 27881004 its reverse (40018872), we get a palindrome (67899876).

The spelling of 27881004 in words is "twenty-seven million, eight hundred eighty-one thousand, four".