724136 has 32 divisors (see below), whose sum is σ = 1583040. Its totient is φ = 304128.

The previous prime is 724123. The next prime is 724153. The reversal of 724136 is 631427.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 724136.

It is an unprimeable number.

724136 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3656 + ... + 3848.

It is an arithmetic number, because the mean of its divisors is an integer number (49470).

2⁷²⁴¹³⁶ 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 724136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791520).

724136 is an abundant number, since it is smaller than the sum of its proper divisors (858904).

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

724136 is a wasteful number, since it uses less digits than its factorization.

724136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 269 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 724136 is about 850.9618087787. The cubic root of 724136 is about 89.7993885571.

It can be divided in two parts, 72 and 4136, that multiplied together give a palindrome (297792).

The spelling of 724136 in words is "seven hundred twenty-four thousand, one hundred thirty-six".