27129770 has 16 divisors (see below), whose sum is σ = 48898728. Its totient is φ = 10837440.

The previous prime is 27129737. The next prime is 27129779. The reversal of 27129770 is 7792172.

It can be written as a sum of positive squares in 4 ways, for example, as 22648081 + 4481689 = 4759^2 + 2117^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27129770.

It is not an unprimeable number, because it can be changed into a prime (27129779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9332 + ... + 11888.

Almost surely, 2^27129770 is an apocalyptic number.

27129770 is a deficient number, since it is larger than the sum of its proper divisors (21768958).

27129770 is a wasteful number, since it uses less digits than its factorization.

27129770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 27129770 is about 5208.6245785236. The cubic root of 27129770 is about 300.4798616630.

The spelling of 27129770 in words is "twenty-seven million, one hundred twenty-nine thousand, seven hundred seventy".