720846 has 32 divisors (see below), whose sum is σ = 1831680. Its totient is φ = 205848.

The previous prime is 720829. The next prime is 720847. The reversal of 720846 is 648027.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720847) by changing a digit.

720846 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (57240).

2⁷²⁰⁸⁴⁶ is an apocalyptic number.

720846 is an abundant number, since it is smaller than the sum of its proper divisors (1110834).

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

720846 is a wasteful number, since it uses less digits than its factorization.

720846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 720846 is about 849.0265013532. The cubic root of 720846 is about 89.6631855281.

The spelling of 720846 in words is "seven hundred twenty thousand, eight hundred forty-six".