27273640 has 16 divisors (see below), whose sum is σ = 61365780. Its totient is φ = 10909440.

The previous prime is 27273619. The next prime is 27273689. The reversal of 27273640 is 4637272.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27269284 + 4356 = 5222^2 + 66^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340881 + ... + 340960.

Almost surely, 2^27273640 is an apocalyptic number.

27273640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27273640 is an abundant number, since it is smaller than the sum of its proper divisors (34092140).

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

27273640 is a wasteful number, since it uses less digits than its factorization.

27273640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681852 (or 681848 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 27273640 is about 5222.4170649231. The cubic root of 27273640 is about 301.0100768141.

The spelling of 27273640 in words is "twenty-seven million, two hundred seventy-three thousand, six hundred forty".