1223680 has 44 divisors (see below), whose sum is σ = 2947680. Its totient is φ = 487424.

The previous prime is 1223633. The next prime is 1223683. The reversal of 1223680 is 863221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223683) 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, 5001 + ... + 5239.

2^1223680 is an apocalyptic number.

1223680 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 1223680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473840).

1223680 is an abundant number, since it is smaller than the sum of its proper divisors (1724000).

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

1223680 is an equidigital number, since it uses as much as digits as its factorization.

1223680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1223680 is about 1106.2007051164. The cubic root of 1223680 is about 106.9603020406.

The spelling of 1223680 in words is "one million, two hundred twenty-three thousand, six hundred eighty".