12747840 has 168 divisors, whose sum is σ = 47256192. Its totient is φ = 2903040.

The previous prime is 12747827. The next prime is 12747853. The reversal of 12747840 is 4874721.

It is an interprime number because it is at equal distance from previous prime (12747827) and next prime (12747853).

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46905 + ... + 47175.

Almost surely, 2^12747840 is an apocalyptic number.

12747840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12747840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23628096).

12747840 is an abundant number, since it is smaller than the sum of its proper divisors (34508352).

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

12747840 is a wasteful number, since it uses less digits than its factorization.

12747840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 12747840 is about 3570.4117409621. The cubic root of 12747840 is about 233.6032432151.

The spelling of 12747840 in words is "twelve million, seven hundred forty-seven thousand, eight hundred forty".