27831740 has 12 divisors (see below), whose sum is σ = 58446696. Its totient is φ = 11132688.

The previous prime is 27831691. The next prime is 27831763. The reversal of 27831740 is 4713872.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27831697 and 27831706.

It is a congruent number.

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, 695774 + ... + 695813.

It is an arithmetic number, because the mean of its divisors is an integer number (4870558).

Almost surely, 2^27831740 is an apocalyptic number.

27831740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27831740 is an abundant number, since it is smaller than the sum of its proper divisors (30614956).

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

27831740 is a wasteful number, since it uses less digits than its factorization.

27831740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391596 (or 1391594 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 27831740 is about 5275.5795890120. The cubic root of 27831740 is about 303.0494170145.

The spelling of 27831740 in words is "twenty-seven million, eight hundred thirty-one thousand, seven hundred forty".