27990357 has 4 divisors (see below), whose sum is σ = 37320480. Its totient is φ = 18660236.

The previous prime is 27990349. The next prime is 27990359. The reversal of 27990357 is 75309972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27990357 - 2³ = 27990349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27990359) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4665057 + ... + 4665062.

It is an arithmetic number, because the mean of its divisors is an integer number (9330120).

Almost surely, 2^27990357 is an apocalyptic number.

It is an amenable number.

27990357 is a deficient number, since it is larger than the sum of its proper divisors (9330123).

27990357 is an equidigital number, since it uses as much as digits as its factorization.

27990357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330122.

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

The square root of 27990357 is about 5290.5913658116. The cubic root of 27990357 is about 303.6240338666.

The spelling of 27990357 in words is "twenty-seven million, nine hundred ninety thousand, three hundred fifty-seven".