1223394240 has 112 divisors (see below), whose sum is σ = 3909498912. Its totient is φ = 324120576.

The previous prime is 1223394229. The next prime is 1223394269. The reversal of 1223394240 is 424933221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1223394198 and 1223394207.

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, 146662 + ... + 154778.

Almost surely, 2^1223394240 is an apocalyptic number.

1223394240 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 1223394240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1954749456).

1223394240 is an abundant number, since it is smaller than the sum of its proper divisors (2686104672).

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

1223394240 is a wasteful number, since it uses less digits than its factorization.

1223394240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294 (or 8284 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1223394240 is about 34977.0530491064. The cubic root of 1223394240 is about 1069.5197542054.

The spelling of 1223394240 in words is "one billion, two hundred twenty-three million, three hundred ninety-four thousand, two hundred forty".