720356 has 24 divisors (see below), whose sum is σ = 1552320. Its totient is φ = 284832.

The previous prime is 720319. The next prime is 720359. The reversal of 720356 is 653027.

It is not an unprimeable number, because it can be changed into a prime (720359) by changing a digit.

720356 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 626 + ... + 1353.

It is an arithmetic number, because the mean of its divisors is an integer number (64680).

2⁷²⁰³⁵⁶ is an apocalyptic number.

It is an amenable number.

720356 is an abundant number, since it is smaller than the sum of its proper divisors (831964).

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

720356 is a wasteful number, since it uses less digits than its factorization.

720356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003 (or 2001 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 720356 is about 848.7378865115. The cubic root of 720356 is about 89.6428645350.

The spelling of 720356 in words is "seven hundred twenty thousand, three hundred fifty-six".