27212840 has 16 divisors (see below), whose sum is σ = 61228980. Its totient is φ = 10885120.

The previous prime is 27212839. The next prime is 27212849. The reversal of 27212840 is 4821272.

It can be written as a sum of positive squares in 2 ways, for example, as 25989604 + 1223236 = 5098^2 + 1106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27212849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340121 + ... + 340200.

Almost surely, 2^27212840 is an apocalyptic number.

27212840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27212840 is an abundant number, since it is smaller than the sum of its proper divisors (34016140).

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

27212840 is a wasteful number, since it uses less digits than its factorization.

27212840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680332 (or 680328 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 27212840 is about 5216.5927577299. The cubic root of 27212840 is about 300.7862339501.

The spelling of 27212840 in words is "twenty-seven million, two hundred twelve thousand, eight hundred forty".