12840700 has 36 divisors (see below), whose sum is σ = 28262080. Its totient is φ = 5063040.

The previous prime is 12840697. The next prime is 12840743. The reversal of 12840700 is 704821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6421 + ... + 8179.

Almost surely, 2^12840700 is an apocalyptic number.

12840700 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 12840700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14131040).

12840700 is an abundant number, since it is smaller than the sum of its proper divisors (15421380).

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

12840700 is a wasteful number, since it uses less digits than its factorization.

12840700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 12840700 is about 3583.3922475777. The cubic root of 12840700 is about 234.1690890752.

The spelling of 12840700 in words is "twelve million, eight hundred forty thousand, seven hundred".