27831340 has 12 divisors (see below), whose sum is σ = 58445856. Its totient is φ = 11132528.

The previous prime is 27831317. The next prime is 27831341. The reversal of 27831340 is 4313872.

It is a junction number, because it is equal to n+sod(n) for n = 27831299 and 27831308.

It is not an unprimeable number, because it can be changed into a prime (27831341) 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 3 ways as a sum of consecutive naturals, for example, 695764 + ... + 695803.

It is an arithmetic number, because the mean of its divisors is an integer number (4870488).

Almost surely, 2^27831340 is an apocalyptic number.

27831340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27831340 is an abundant number, since it is smaller than the sum of its proper divisors (30614516).

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

27831340 is a wasteful number, since it uses less digits than its factorization.

27831340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391576 (or 1391574 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 27831340 is about 5275.5416783492. The cubic root of 27831340 is about 303.0479651907.

The spelling of 27831340 in words is "twenty-seven million, eight hundred thirty-one thousand, three hundred forty".