12820830 has 32 divisors (see below), whose sum is σ = 33568128. Its totient is φ = 3108000.

The previous prime is 12820817. The next prime is 12820849. The reversal of 12820830 is 3802821.

12820830 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 self number, because there is not a number n which added to its sum of digits gives 12820830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19096 + ... + 19755.

It is an arithmetic number, because the mean of its divisors is an integer number (1049004).

Almost surely, 2^12820830 is an apocalyptic number.

12820830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12820830 is an abundant number, since it is smaller than the sum of its proper divisors (20747298).

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

12820830 is a wasteful number, since it uses less digits than its factorization.

12820830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38872.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12820830 is about 3580.6186616282. The cubic root of 12820830 is about 234.0482404743.

Subtracting from 12820830 its reverse (3802821), we obtain a square (9018009 = 3003²).

The spelling of 12820830 in words is "twelve million, eight hundred twenty thousand, eight hundred thirty".