27731632340 has 12 divisors (see below), whose sum is σ = 58236427956. Its totient is φ = 11092652928.

The previous prime is 27731632337. The next prime is 27731632351. The reversal of 27731632340 is 4323613772.

It can be written as a sum of positive squares in 2 ways, for example, as 8679903556 + 19051728784 = 93166^2 + 138028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27731632294 and 27731632303.

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, 693290789 + ... + 693290828.

It is an arithmetic number, because the mean of its divisors is an integer number (4853035663).

Almost surely, 2^27731632340 is an apocalyptic number.

27731632340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27731632340 is an abundant number, since it is smaller than the sum of its proper divisors (30504795616).

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

27731632340 is a wasteful number, since it uses less digits than its factorization.

27731632340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386581626 (or 1386581624 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 38.

The spelling of 27731632340 in words is "twenty-seven billion, seven hundred thirty-one million, six hundred thirty-two thousand, three hundred forty".