720774 has 24 divisors (see below), whose sum is σ = 1630512. Its totient is φ = 229680.

The previous prime is 720773. The next prime is 720779. The reversal of 720774 is 477027.

It is a happy number.

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 720774.

It is not an unprimeable number, because it can be changed into a prime (720773) by changing a digit.

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, 457 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (67938).

2⁷²⁰⁷⁷⁴ is an apocalyptic number.

720774 is an abundant number, since it is smaller than the sum of its proper divisors (909738).

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

720774 is a wasteful number, since it uses less digits than its factorization.

720774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1769 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 720774 is about 848.9840987910. The cubic root of 720774 is about 89.6602001635.

Adding to 720774 its sum of digits (27), we get a square (720801 = 849²).

The spelling of 720774 in words is "seven hundred twenty thousand, seven hundred seventy-four", and thus it is an iban number.