12207780 has 192 divisors, whose sum is σ = 42900480. Its totient is φ = 2861568.

The previous prime is 12207773. The next prime is 12207787. The reversal of 12207780 is 8770221.

It is an interprime number because it is at equal distance from previous prime (12207773) and next prime (12207787).

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

It is not an unprimeable number, because it can be changed into a prime (12207787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 259717 + ... + 259763.

It is an arithmetic number, because the mean of its divisors is an integer number (223440).

Almost surely, 2^12207780 is an apocalyptic number.

12207780 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 12207780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21450240).

12207780 is an abundant number, since it is smaller than the sum of its proper divisors (30692700).

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

12207780 is a wasteful number, since it uses less digits than its factorization.

12207780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 12207780 is about 3493.9633655778. The cubic root of 12207780 is about 230.2566762698.

The spelling of 12207780 in words is "twelve million, two hundred seven thousand, seven hundred eighty".