12837820 has 12 divisors (see below), whose sum is σ = 26959464. Its totient is φ = 5135120.

The previous prime is 12837809. The next prime is 12837821. The reversal of 12837820 is 2873821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12837821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320926 + ... + 320965.

It is an arithmetic number, because the mean of its divisors is an integer number (2246622).

Almost surely, 2^12837820 is an apocalyptic number.

12837820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12837820 is an abundant number, since it is smaller than the sum of its proper divisors (14121644).

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

12837820 is a wasteful number, since it uses less digits than its factorization.

12837820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641900 (or 641898 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 12837820 is about 3582.9903711844. The cubic root of 12837820 is about 234.1515807513.

The spelling of 12837820 in words is "twelve million, eight hundred thirty-seven thousand, eight hundred twenty".