27724785460 has 12 divisors (see below), whose sum is σ = 58222049508. Its totient is φ = 11089914176.

The previous prime is 27724785449. The next prime is 27724785463. The reversal of 27724785460 is 6458742772.

It can be written as a sum of positive squares in 2 ways, for example, as 20866958116 + 6857827344 = 144454^2 + 82812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27724785398 and 27724785407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27724785463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693119617 + ... + 693119656.

It is an arithmetic number, because the mean of its divisors is an integer number (4851837459).

Almost surely, 2^27724785460 is an apocalyptic number.

27724785460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27724785460 is an abundant number, since it is smaller than the sum of its proper divisors (30497264048).

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

27724785460 is a wasteful number, since it uses less digits than its factorization.

27724785460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386239282 (or 1386239280 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 52.

The spelling of 27724785460 in words is "twenty-seven billion, seven hundred twenty-four million, seven hundred eighty-five thousand, four hundred sixty".