27750431387 has 8 divisors (see below), whose sum is σ = 31717778400. Its totient is φ = 23783834304.

The previous prime is 27750431353. The next prime is 27750431393. The reversal of 27750431387 is 78313405772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27750431387 - 2²² = 27746237083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27750431327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105812 + ... + 258257.

It is an arithmetic number, because the mean of its divisors is an integer number (3964722300).

Almost surely, 2^27750431387 is an apocalyptic number.

27750431387 is a deficient number, since it is larger than the sum of its proper divisors (3967347013).

27750431387 is a wasteful number, since it uses less digits than its factorization.

27750431387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374965.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 27750431387 in words is "twenty-seven billion, seven hundred fifty million, four hundred thirty-one thousand, three hundred eighty-seven".