720838 has 8 divisors (see below), whose sum is σ = 1085040. Its totient is φ = 359160.

The previous prime is 720829. The next prime is 720847. The reversal of 720838 is 838027.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (720829) and next prime (720847).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 468 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (135630).

2⁷²⁰⁸³⁸ is an apocalyptic number.

720838 is a deficient number, since it is larger than the sum of its proper divisors (364202).

720838 is a wasteful number, since it uses less digits than its factorization.

720838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 720838 is about 849.0217900620. The cubic root of 720838 is about 89.6628538307.

The spelling of 720838 in words is "seven hundred twenty thousand, eight hundred thirty-eight".