723140736 has 64 divisors (see below), whose sum is σ = 1928208000. Its totient is φ = 240122880.

The previous prime is 723140729. The next prime is 723140749. The reversal of 723140736 is 637041327.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 723140697 and 723140706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100590 + ... + 107538.

It is an arithmetic number, because the mean of its divisors is an integer number (30128250).

Almost surely, 2^723140736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723140736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964104000).

723140736 is an abundant number, since it is smaller than the sum of its proper divisors (1205067264).

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

723140736 is a wasteful number, since it uses less digits than its factorization.

723140736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237 (or 7225 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 723140736 is about 26891.2762062346. The cubic root of 723140736 is about 897.5822912676.

The spelling of 723140736 in words is "seven hundred twenty-three million, one hundred forty thousand, seven hundred thirty-six".