12767220 has 144 divisors (see below), whose sum is σ = 41827968. Its totient is φ = 3265920.

The previous prime is 12767219. The next prime is 12767233. The reversal of 12767220 is 2276721.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179785 + ... + 179855.

It is an arithmetic number, because the mean of its divisors is an integer number (290472).

Almost surely, 2^12767220 is an apocalyptic number.

12767220 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 12767220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20913984).

12767220 is an abundant number, since it is smaller than the sum of its proper divisors (29060748).

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

12767220 is a wasteful number, since it uses less digits than its factorization.

12767220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 12767220 is about 3573.1246829631. The cubic root of 12767220 is about 233.7215623082.

The spelling of 12767220 in words is "twelve million, seven hundred sixty-seven thousand, two hundred twenty".