27995730 has 64 divisors (see below), whose sum is σ = 79453440. Its totient is φ = 6177024.

The previous prime is 27995729. The next prime is 27995771. The reversal of 27995730 is 3759972.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 31 ways as a sum of consecutive naturals, for example, 3792 + ... + 8388.

It is an arithmetic number, because the mean of its divisors is an integer number (1241460).

Almost surely, 2^27995730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27995730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39726720).

27995730 is an abundant number, since it is smaller than the sum of its proper divisors (51457710).

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

27995730 is a wasteful number, since it uses less digits than its factorization.

27995730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4643.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 27995730 is about 5291.0991296705. The cubic root of 27995730 is about 303.6434604089.

The spelling of 27995730 in words is "twenty-seven million, nine hundred ninety-five thousand, seven hundred thirty".