27995904 has 108 divisors (see below), whose sum is σ = 83701800. Its totient is φ = 8988672.

The previous prime is 27995893. The next prime is 27995921. The reversal of 27995904 is 40959972.

It is a self number, because there is not a number n which added to its sum of digits gives 27995904.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 66607 + ... + 67025.

Almost surely, 2^27995904 is an apocalyptic number.

27995904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27995904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41850900).

27995904 is an abundant number, since it is smaller than the sum of its proper divisors (55705896).

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

27995904 is a wasteful number, since it uses less digits than its factorization.

27995904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 27995904 is about 5291.1155723533. The cubic root of 27995904 is about 303.6440894793.

The spelling of 27995904 in words is "twenty-seven million, nine hundred ninety-five thousand, nine hundred four".