27550990 has 32 divisors (see below), whose sum is σ = 50971680. Its totient is φ = 10717824.

The previous prime is 27550979. The next prime is 27550997. The reversal of 27550990 is 9905572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27550997) 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 15 ways as a sum of consecutive naturals, for example, 120196 + ... + 120424.

It is an arithmetic number, because the mean of its divisors is an integer number (1592865).

Almost surely, 2^27550990 is an apocalyptic number.

27550990 is a deficient number, since it is larger than the sum of its proper divisors (23420690).

27550990 is a wasteful number, since it uses less digits than its factorization.

27550990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 27550990 is about 5248.9036950586. The cubic root of 27550990 is about 302.0269774009.

The spelling of 27550990 in words is "twenty-seven million, five hundred fifty thousand, nine hundred ninety".