27870804 has 90 divisors (see below), whose sum is σ = 79050510. Its totient is φ = 8558784.

The previous prime is 27870781. The next prime is 27870809. The reversal of 27870804 is 40807872.

It can be written as a sum of positive squares in 3 ways, for example, as 810000 + 27060804 = 900^2 + 5202^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27870809) 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 29 ways as a sum of consecutive naturals, for example, 54502 + ... + 55010.

It is an arithmetic number, because the mean of its divisors is an integer number (878339).

Almost surely, 2^27870804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27870804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39525255).

27870804 is an abundant number, since it is smaller than the sum of its proper divisors (51179706).

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

27870804 is a wasteful number, since it uses less digits than its factorization.

27870804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 27870804 is about 5279.2806328135. The cubic root of 27870804 is about 303.1911351641.

The spelling of 27870804 in words is "twenty-seven million, eight hundred seventy thousand, eight hundred four".