1223758240 has 96 divisors (see below), whose sum is σ = 3121130880. Its totient is φ = 452035584.

The previous prime is 1223758219. The next prime is 1223758273. The reversal of 1223758240 is 428573221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1223758196 and 1223758205.

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 15 ways as a sum of consecutive naturals, for example, 100987 + ... + 112453.

It is an arithmetic number, because the mean of its divisors is an integer number (32511780).

Almost surely, 2^1223758240 is an apocalyptic number.

1223758240 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 1223758240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560565440).

1223758240 is an abundant number, since it is smaller than the sum of its proper divisors (1897372640).

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

1223758240 is a wasteful number, since it uses less digits than its factorization.

1223758240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11534 (or 11526 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1223758240 is about 34982.2560736154. The cubic root of 1223758240 is about 1069.6258161146.

The spelling of 1223758240 in words is "one billion, two hundred twenty-three million, seven hundred fifty-eight thousand, two hundred forty".