12771388 has 24 divisors (see below), whose sum is σ = 25625600. Its totient is φ = 5455728.

The previous prime is 12771337. The next prime is 12771391. The reversal of 12771388 is 88317721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11773 + ... + 12811.

Almost surely, 2^12771388 is an apocalyptic number.

It is an amenable number.

12771388 is an abundant number, since it is smaller than the sum of its proper divisors (12854212).

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

12771388 is a wasteful number, since it uses less digits than its factorization.

12771388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1487 counting only the distinct ones).

The product of its digits is 18816, while the sum is 37.

The square root of 12771388 is about 3573.7078783807. The cubic root of 12771388 is about 233.7469932030.

The spelling of 12771388 in words is "twelve million, seven hundred seventy-one thousand, three hundred eighty-eight".