720290 has 32 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 255744.

The previous prime is 720289. The next prime is 720299. The reversal of 720290 is 92027.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720290.

It is not an unprimeable number, because it can be changed into a prime (720299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3119 + ... + 3341.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2⁷²⁰²⁹⁰ is an apocalyptic number.

720290 is an abundant number, since it is smaller than the sum of its proper divisors (731230).

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

720290 is a wasteful number, since it uses less digits than its factorization.

720290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 720290 is about 848.6990043590. The cubic root of 720290 is about 89.6401267175.

The spelling of 720290 in words is "seven hundred twenty thousand, two hundred ninety".