720620 has 24 divisors (see below), whose sum is σ = 1530144. Its totient is φ = 285056.

The previous prime is 720619. The next prime is 720653. The reversal of 720620 is 26027.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2609 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (63756).

2⁷²⁰⁶²⁰ is an apocalyptic number.

It is an amenable number.

720620 is an abundant number, since it is smaller than the sum of its proper divisors (809524).

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

720620 is a wasteful number, since it uses less digits than its factorization.

720620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 407 counting only the distinct ones).

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

The square root of 720620 is about 848.8933973121. The cubic root of 720620 is about 89.6538141330.

Adding to 720620 its reverse (26027), we get a palindrome (746647).

The spelling of 720620 in words is "seven hundred twenty thousand, six hundred twenty".