724236 has 12 divisors (see below), whose sum is σ = 1689912. Its totient is φ = 241408.

The previous prime is 724219. The next prime is 724259. The reversal of 724236 is 632427.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a d-powerful number, because it can be written as 7⁶ + 2¹¹ + 2¹⁷ + 4⁷ + 3¹¹ + 6⁷ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30165 + ... + 30188.

It is an arithmetic number, because the mean of its divisors is an integer number (140826).

2⁷²⁴²³⁶ is an apocalyptic number.

It is an amenable number.

724236 is an abundant number, since it is smaller than the sum of its proper divisors (965676).

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

724236 is a wasteful number, since it uses less digits than its factorization.

724236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60360 (or 60358 counting only the distinct ones).

The product of its digits is 2016, while the sum is 24.

The square root of 724236 is about 851.0205637938. The cubic root of 724236 is about 89.8035220005.

Subtracting from 724236 its reverse (632427), we obtain a square (91809 = 303²).

The spelling of 724236 in words is "seven hundred twenty-four thousand, two hundred thirty-six".