723434700305240 has 128 divisors (see below), whose sum is σ = 2029706859179520. Its totient is φ = 225449296358400.

The previous prime is 723434700305159. The next prime is 723434700305281. The reversal of 723434700305240 is 42503007434327.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 723434700305191 and 723434700305200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333842 + ... + 38039201.

It is an arithmetic number, because the mean of its divisors is an integer number (15857084837340).

Almost surely, 2^{723434700305240} is an apocalyptic number.

723434700305240 is a gapful number since it is divisible by the number (70) 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 723434700305240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1014853429589760).

723434700305240 is an abundant number, since it is smaller than the sum of its proper divisors (1306272158874280).

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

723434700305240 is a wasteful number, since it uses less digits than its factorization.

723434700305240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38379193 (or 38379189 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 44.

Adding to 723434700305240 its reverse (42503007434327), we get a palindrome (765937707739567).

The spelling of 723434700305240 in words is "seven hundred twenty-three trillion, four hundred thirty-four billion, seven hundred million, three hundred five thousand, two hundred forty".