1223904 has 96 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 345600.

The previous prime is 1223897. The next prime is 1223921. The reversal of 1223904 is 4093221.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20034 + ... + 20094.

It is an arithmetic number, because the mean of its divisors is an integer number (39060).

2^1223904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874880).

1223904 is an abundant number, since it is smaller than the sum of its proper divisors (2525856).

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

1223904 is a wasteful number, since it uses less digits than its factorization.

1223904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1223904 is about 1106.3019479328. The cubic root of 1223904 is about 106.9668281602.

The spelling of 1223904 in words is "one million, two hundred twenty-three thousand, nine hundred four".