1233820 has 36 divisors (see below), whose sum is σ = 3016440. Its totient is φ = 422688.

The previous prime is 1233781. The next prime is 1233851. The reversal of 1233820 is 283321.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 351 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^1233820 is an apocalyptic number.

1233820 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 1233820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508220).

1233820 is an abundant number, since it is smaller than the sum of its proper divisors (1782620).

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

1233820 is a wasteful number, since it uses less digits than its factorization.

1233820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1233820 is about 1110.7745045688. The cubic root of 1233820 is about 107.2549311925.

The spelling of 1233820 in words is "one million, two hundred thirty-three thousand, eight hundred twenty".