23303785440 has 192 divisors, whose sum is σ = 79412852736. Its totient is φ = 5710252032.

The previous prime is 23303785423. The next prime is 23303785441. The reversal of 23303785440 is 4458730332.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23303785441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1383147 + ... + 1399893.

It is an arithmetic number, because the mean of its divisors is an integer number (413608608).

Almost surely, 2^23303785440 is an apocalyptic number.

23303785440 is a gapful number since it is divisible by the number (20) 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 23303785440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39706426368).

23303785440 is an abundant number, since it is smaller than the sum of its proper divisors (56109067296).

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

23303785440 is a wasteful number, since it uses less digits than its factorization.

23303785440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17001 (or 16993 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 23303785440 in words is "twenty-three billion, three hundred three million, seven hundred eighty-five thousand, four hundred forty".