27019990 has 32 divisors (see below), whose sum is σ = 50506560. Its totient is φ = 10399104.

The previous prime is 27019981. The next prime is 27020023. The reversal of 27019990 is 9991072.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 37756 + ... + 38464.

It is an arithmetic number, because the mean of its divisors is an integer number (1578330).

Almost surely, 2^27019990 is an apocalyptic number.

27019990 is a deficient number, since it is larger than the sum of its proper divisors (23486570).

27019990 is a wasteful number, since it uses less digits than its factorization.

27019990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 27019990 is about 5198.0756054525. The cubic root of 27019990 is about 300.0740187729.

The spelling of 27019990 in words is "twenty-seven million, nineteen thousand, nine hundred ninety".