27731774420 has 72 divisors (see below), whose sum is σ = 67771228896. Its totient is φ = 9504323136.

The previous prime is 27731774417. The next prime is 27731774443. The reversal of 27731774420 is 2447713772.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3942947 + ... + 3949973.

It is an arithmetic number, because the mean of its divisors is an integer number (941267068).

Almost surely, 2^27731774420 is an apocalyptic number.

27731774420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27731774420 is an abundant number, since it is smaller than the sum of its proper divisors (40039454476).

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

27731774420 is a wasteful number, since it uses less digits than its factorization.

27731774420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077 (or 11068 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 44.

The spelling of 27731774420 in words is "twenty-seven billion, seven hundred thirty-one million, seven hundred seventy-four thousand, four hundred twenty".