27788730 has 32 divisors (see below), whose sum is σ = 66852864. Its totient is φ = 7392576.

The previous prime is 27788723. The next prime is 27788731. The reversal of 27788730 is 3788772.

It is not an unprimeable number, because it can be changed into a prime (27788731) 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 15 ways as a sum of consecutive naturals, for example, 15879 + ... + 17541.

It is an arithmetic number, because the mean of its divisors is an integer number (2089152).

Almost surely, 2^27788730 is an apocalyptic number.

27788730 is an abundant number, since it is smaller than the sum of its proper divisors (39064134).

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

27788730 is a wasteful number, since it uses less digits than its factorization.

27788730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 27788730 is about 5271.5016835813. The cubic root of 27788730 is about 302.8932299257.

Adding to 27788730 its sum of digits (42), we get a palindrome (27788772).

The spelling of 27788730 in words is "twenty-seven million, seven hundred eighty-eight thousand, seven hundred thirty".