720026 has 8 divisors (see below), whose sum is σ = 1086804. Its totient is φ = 357760.

The previous prime is 720023. The next prime is 720053. The reversal of 720026 is 620027.

It can be written as a sum of positive squares in 2 ways, for example, as 697225 + 22801 = 835^2 + 151^2 .

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 = 719986 and 720013.

It is not an unprimeable number, because it can be changed into a prime (720023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695 + ... + 1386.

2⁷²⁰⁰²⁶ is an apocalyptic number.

720026 is a deficient number, since it is larger than the sum of its proper divisors (366778).

720026 is a wasteful number, since it uses less digits than its factorization.

720026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 720026 is about 848.5434579325. The cubic root of 720026 is about 89.6291737749.

Subtracting from 720026 its reverse (620027), we obtain a palindrome (99999).

The spelling of 720026 in words is "seven hundred twenty thousand, twenty-six".