1223880 has 128 divisors (see below), whose sum is σ = 4423680. Its totient is φ = 264960.

The previous prime is 1223879. The next prime is 1223897. The reversal of 1223880 is 883221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26017 + ... + 26063.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2^1223880 is an apocalyptic number.

1223880 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 1223880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211840).

1223880 is an abundant number, since it is smaller than the sum of its proper divisors (3199800).

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

1223880 is a wasteful number, since it uses less digits than its factorization.

1223880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1223880 is about 1106.2911009314. The cubic root of 1223880 is about 106.9661289712.

The spelling of 1223880 in words is "one million, two hundred twenty-three thousand, eight hundred eighty".