720926 has 8 divisors (see below), whose sum is σ = 1091640. Its totient is φ = 357048.

The previous prime is 720913. The next prime is 720931. The reversal of 720926 is 629027.

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

It is a junction number, because it is equal to n+sod(n) for n = 720895 and 720904.

It is a congruent number.

It is an unprimeable number.

720926 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (136455).

2⁷²⁰⁹²⁶ is an apocalyptic number.

720926 is a deficient number, since it is larger than the sum of its proper divisors (370714).

720926 is a wasteful number, since it uses less digits than its factorization.

720926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 720926 is about 849.0736128275. The cubic root of 720926 is about 89.6665023667. Note that the first 3 decimals are identical.

The spelling of 720926 in words is "seven hundred twenty thousand, nine hundred twenty-six".