723887520 has 96 divisors (see below), whose sum is σ = 2318984640. Its totient is φ = 189757440.

The previous prime is 723887477. The next prime is 723887581. The reversal of 723887520 is 25788327.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×723887520² = 1048026283223500800, which contains 22 as substring.

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, 15540 + ... + 41100.

It is an arithmetic number, because the mean of its divisors is an integer number (24156090).

Almost surely, 2^723887520 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 723887520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159492320).

723887520 is an abundant number, since it is smaller than the sum of its proper divisors (1595097120).

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

723887520 is a wasteful number, since it uses less digits than its factorization.

723887520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25638 (or 25630 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 723887520 is about 26905.1578698212. The cubic root of 723887520 is about 897.8911612908.

The spelling of 723887520 in words is "seven hundred twenty-three million, eight hundred eighty-seven thousand, five hundred twenty".