27781090 has 8 divisors (see below), whose sum is σ = 50005980. Its totient is φ = 11112432.

The previous prime is 27781087. The next prime is 27781129. The reversal of 27781090 is 9018772.

It can be written as a sum of positive squares in 2 ways, for example, as 27217089 + 564001 = 5217^2 + 751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389045 + ... + 1389064.

Almost surely, 2^27781090 is an apocalyptic number.

27781090 is a deficient number, since it is larger than the sum of its proper divisors (22224890).

27781090 is a wasteful number, since it uses less digits than its factorization.

27781090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778116.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 27781090 is about 5270.7769825710. The cubic root of 27781090 is about 302.8654690747.

The spelling of 27781090 in words is "twenty-seven million, seven hundred eighty-one thousand, ninety".