27820245 has 32 divisors (see below), whose sum is σ = 47761920. Its totient is φ = 13777920.

The previous prime is 27820241. The next prime is 27820253. The reversal of 27820245 is 54202872.

It is not a de Polignac number, because 27820245 - 2² = 27820241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27820241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19455 + ... + 20835.

It is an arithmetic number, because the mean of its divisors is an integer number (1492560).

Almost surely, 2^27820245 is an apocalyptic number.

It is an amenable number.

27820245 is a deficient number, since it is larger than the sum of its proper divisors (19941675).

27820245 is a wasteful number, since it uses less digits than its factorization.

27820245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 27820245 is about 5274.4900227415. The cubic root of 27820245 is about 303.0076896827.

The spelling of 27820245 in words is "twenty-seven million, eight hundred twenty thousand, two hundred forty-five".