724838 has 4 divisors (see below), whose sum is σ = 1087260. Its totient is φ = 362418.

The previous prime is 724837. The next prime is 724847. The reversal of 724838 is 838427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838427 = 79 ⋅10613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724837) 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 as a sum of consecutive naturals, namely, 181208 + ... + 181211.

It is an arithmetic number, because the mean of its divisors is an integer number (271815).

2⁷²⁴⁸³⁸ is an apocalyptic number.

724838 is a deficient number, since it is larger than the sum of its proper divisors (362422).

724838 is a wasteful number, since it uses less digits than its factorization.

724838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362421.

The product of its digits is 10752, while the sum is 32.

The square root of 724838 is about 851.3741833060. The cubic root of 724838 is about 89.8283972935.

The spelling of 724838 in words is "seven hundred twenty-four thousand, eight hundred thirty-eight".