406724 has 6 divisors (see below), whose sum is σ = 711774. Its totient is φ = 203360.

The previous prime is 406717. The next prime is 406729. The reversal of 406724 is 427604.

It can be written as a sum of positive squares in only one way, i.e., 322624 + 84100 = 568^2 + 290^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 406724.

It is not an unprimeable number, because it can be changed into a prime (406729) by changing a digit.

406724 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 as a sum of consecutive naturals, namely, 50837 + ... + 50844.

It is an arithmetic number, because the mean of its divisors is an integer number (118629).

2⁴⁰⁶⁷²⁴ is an apocalyptic number.

It is an amenable number.

406724 is a deficient number, since it is larger than the sum of its proper divisors (305050).

406724 is a wasteful number, since it uses less digits than its factorization.

406724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101685 (or 101683 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 406724 is about 637.7491669928. The cubic root of 406724 is about 74.0911950918.

The spelling of 406724 in words is "four hundred six thousand, seven hundred twenty-four".