12297780 has 72 divisors (see below), whose sum is σ = 40701024. Its totient is φ = 2980800.

The previous prime is 12297773. The next prime is 12297787. The reversal of 12297780 is 8779221.

It is an interprime number because it is at equal distance from previous prime (12297773) and next prime (12297787).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12297787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1126 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (565292).

Almost surely, 2^12297780 is an apocalyptic number.

12297780 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 12297780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20350512).

12297780 is an abundant number, since it is smaller than the sum of its proper divisors (28403244).

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

12297780 is a wasteful number, since it uses less digits than its factorization.

12297780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237 (or 6232 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 12297780 is about 3506.8190714663. The cubic root of 12297780 is about 230.8211355042.

It can be divided in two parts, 1229 and 7780, that added together give a palindrome (9009).

The spelling of 12297780 in words is "twelve million, two hundred ninety-seven thousand, seven hundred eighty".