12789840 has 160 divisors (see below), whose sum is σ = 47425536. Its totient is φ = 2787840.

The previous prime is 12789823. The next prime is 12789857. The reversal of 12789840 is 4898721.

It is an interprime number because it is at equal distance from previous prime (12789823) and next prime (12789857).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38475 + ... + 38805.

Almost surely, 2^12789840 is an apocalyptic number.

12789840 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 12789840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23712768).

12789840 is an abundant number, since it is smaller than the sum of its proper divisors (34635696).

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

12789840 is a wasteful number, since it uses less digits than its factorization.

12789840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 12789840 is about 3576.2885789600. The cubic root of 12789840 is about 233.8595109655.

The spelling of 12789840 in words is "twelve million, seven hundred eighty-nine thousand, eight hundred forty".