720790 has 24 divisors (see below), whose sum is σ = 1510272. Its totient is φ = 246960.

The previous prime is 720779. The next prime is 720791. The reversal of 720790 is 97027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720791) by changing a digit.

720790 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 11 ways as a sum of consecutive naturals, for example, 246 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (62928).

2⁷²⁰⁷⁹⁰ is an apocalyptic number.

720790 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

720790 is an abundant number, since it is smaller than the sum of its proper divisors (789482).

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

720790 is a wasteful number, since it uses less digits than its factorization.

720790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492 (or 1485 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 720790 is about 848.9935217656. The cubic root of 720790 is about 89.6608635951.

It can be divided in two parts, 7 and 20790, that multiplied together give a triangular number (145530 = T₅₃₉).

The spelling of 720790 in words is "seven hundred twenty thousand, seven hundred ninety".