1223332440 has 64 divisors (see below), whose sum is σ = 4003637760. Its totient is φ = 296565120.

The previous prime is 1223332417. The next prime is 1223332469. The reversal of 1223332440 is 442333221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1223332440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462064 + ... + 464703.

It is an arithmetic number, because the mean of its divisors is an integer number (62556840).

Almost surely, 2^1223332440 is an apocalyptic number.

1223332440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223332440 is an abundant number, since it is smaller than the sum of its proper divisors (2780305320).

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

1223332440 is a wasteful number, since it uses less digits than its factorization.

1223332440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926792 (or 926788 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1223332440 is about 34976.1696016016. The cubic root of 1223332440 is about 1069.5017449020.

Adding to 1223332440 its reverse (442333221), we get a palindrome (1665665661).

The spelling of 1223332440 in words is "one billion, two hundred twenty-three million, three hundred thirty-two thousand, four hundred forty".