724638 has 32 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 224576.

The previous prime is 724631. The next prime is 724639. The reversal of 724638 is 836427.

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 724638.

It is not an unprimeable number, because it can be changed into a prime (724631) 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 15 ways as a sum of consecutive naturals, for example, 8098 + ... + 8186.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁷²⁴⁶³⁸ is an apocalyptic number.

724638 is an abundant number, since it is smaller than the sum of its proper divisors (830562).

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

724638 is a wasteful number, since it uses less digits than its factorization.

724638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176.

The product of its digits is 8064, while the sum is 30.

The square root of 724638 is about 851.2567180352. The cubic root of 724638 is about 89.8201346048.

The spelling of 724638 in words is "seven hundred twenty-four thousand, six hundred thirty-eight".