12885720 has 64 divisors (see below), whose sum is σ = 38949120. Its totient is φ = 3410304.

The previous prime is 12885709. The next prime is 12885721. The reversal of 12885720 is 2758821.

12885720 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12885721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19719 + ... + 20361.

It is an arithmetic number, because the mean of its divisors is an integer number (608580).

Almost surely, 2^12885720 is an apocalyptic number.

12885720 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 12885720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19474560).

12885720 is an abundant number, since it is smaller than the sum of its proper divisors (26063400).

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

12885720 is a wasteful number, since it uses less digits than its factorization.

12885720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 12885720 is about 3589.6685083723. The cubic root of 12885720 is about 234.4424385491.

The spelling of 12885720 in words is "twelve million, eight hundred eighty-five thousand, seven hundred twenty".