27889771392 has 384 divisors, whose sum is σ = 96454260000. Its totient is φ = 7910203392.

The previous prime is 27889771367. The next prime is 27889771417. The reversal of 27889771392 is 29317798872.

It is an interprime number because it is at equal distance from previous prime (27889771367) and next prime (27889771417).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26586484 + ... + 26587532.

Almost surely, 2^27889771392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27889771392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48227130000).

27889771392 is an abundant number, since it is smaller than the sum of its proper divisors (68564488608).

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

27889771392 is a wasteful number, since it uses less digits than its factorization.

27889771392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1218 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 63.

The spelling of 27889771392 in words is "twenty-seven billion, eight hundred eighty-nine million, seven hundred seventy-one thousand, three hundred ninety-two".