724717664 has 24 divisors (see below), whose sum is σ = 1556496648. Its totient is φ = 329416960.

The previous prime is 724717663. The next prime is 724717699. The reversal of 724717664 is 466717427.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724717663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1029077 + ... + 1029780.

It is an arithmetic number, because the mean of its divisors is an integer number (64854027).

Almost surely, 2^724717664 is an apocalyptic number.

It is an amenable number.

724717664 is an abundant number, since it is smaller than the sum of its proper divisors (831778984).

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

724717664 is a wasteful number, since it uses less digits than its factorization.

724717664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058878 (or 2058870 counting only the distinct ones).

The product of its digits is 395136, while the sum is 44.

The square root of 724717664 is about 26920.5806772439. The cubic root of 724717664 is about 898.2342598113.

The spelling of 724717664 in words is "seven hundred twenty-four million, seven hundred seventeen thousand, six hundred sixty-four".