720738 has 24 divisors (see below), whose sum is σ = 1620528. Its totient is φ = 240084.

The previous prime is 720703. The next prime is 720743. The reversal of 720738 is 837027.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256 + ... + 1227.

It is an arithmetic number, because the mean of its divisors is an integer number (67522).

2⁷²⁰⁷³⁸ is an apocalyptic number.

720738 is an abundant number, since it is smaller than the sum of its proper divisors (899790).

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

720738 is a wasteful number, since it uses less digits than its factorization.

720738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 720738 is about 848.9628967158. The cubic root of 720738 is about 89.6587074067.

The spelling of 720738 in words is "seven hundred twenty thousand, seven hundred thirty-eight".