27820242 has 12 divisors (see below), whose sum is σ = 60277230. Its totient is φ = 9273408.

The previous prime is 27820241. The next prime is 27820253. The reversal of 27820242 is 24202872.

It can be written as a sum of positive squares in only one way, i.e., 18584721 + 9235521 = 4311^2 + 3039^2 .

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 5 ways as a sum of consecutive naturals, for example, 772767 + ... + 772802.

Almost surely, 2^27820242 is an apocalyptic number.

27820242 is an abundant number, since it is smaller than the sum of its proper divisors (32456988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27820242 is a wasteful number, since it uses less digits than its factorization.

27820242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545577 (or 1545574 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 27820242 is about 5274.4897383538. The cubic root of 27820242 is about 303.0076787911.

The spelling of 27820242 in words is "twenty-seven million, eight hundred twenty thousand, two hundred forty-two".