27984490 has 8 divisors (see below), whose sum is σ = 50372100. Its totient is φ = 11193792.

The previous prime is 27984461. The next prime is 27984497. The reversal of 27984490 is 9448972.

It can be written as a sum of positive squares in 2 ways, for example, as 26904969 + 1079521 = 5187^2 + 1039^2 .

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

It is not an unprimeable number, because it can be changed into a prime (27984497) 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 3 ways as a sum of consecutive naturals, for example, 1399215 + ... + 1399234.

Almost surely, 2^27984490 is an apocalyptic number.

27984490 is a deficient number, since it is larger than the sum of its proper divisors (22387610).

27984490 is a wasteful number, since it uses less digits than its factorization.

27984490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798456.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 27984490 is about 5290.0368618753. The cubic root of 27984490 is about 303.6028183854.

The spelling of 27984490 in words is "twenty-seven million, nine hundred eighty-four thousand, four hundred ninety".