12789870 has 64 divisors (see below), whose sum is σ = 32408640. Its totient is φ = 3225600.

The previous prime is 12789859. The next prime is 12789871. The reversal of 12789870 is 7898721.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12789871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52950 + ... + 53190.

It is an arithmetic number, because the mean of its divisors is an integer number (506385).

Almost surely, 2^12789870 is an apocalyptic number.

12789870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12789870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16204320).

12789870 is an abundant number, since it is smaller than the sum of its proper divisors (19618770).

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

12789870 is a wasteful number, since it uses less digits than its factorization.

12789870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 12789870 is about 3576.2927732500. The cubic root of 12789870 is about 233.8596938132.

The spelling of 12789870 in words is "twelve million, seven hundred eighty-nine thousand, eight hundred seventy".