1223790 has 48 divisors (see below), whose sum is σ = 3127248. Its totient is φ = 306432.

The previous prime is 1223777. The next prime is 1223857. The reversal of 1223790 is 973221.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223790.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 10774 + ... + 10886.

It is an arithmetic number, because the mean of its divisors is an integer number (65151).

2^1223790 is an apocalyptic number.

1223790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1563624).

1223790 is an abundant number, since it is smaller than the sum of its proper divisors (1903458).

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

1223790 is a wasteful number, since it uses less digits than its factorization.

1223790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1223790 is about 1106.2504237287. The cubic root of 1223790 is about 106.9635069310.

The spelling of 1223790 in words is "one million, two hundred twenty-three thousand, seven hundred ninety".