720618 has 8 divisors (see below), whose sum is σ = 1441248. Its totient is φ = 240204.

The previous prime is 720617. The next prime is 720619. The reversal of 720618 is 816027.

It is an interprime number because it is at equal distance from previous prime (720617) and next prime (720619).

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

720618 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (720611) 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, 60046 + ... + 60057.

It is an arithmetic number, because the mean of its divisors is an integer number (180156).

2⁷²⁰⁶¹⁸ is an apocalyptic number.

720618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

720618 is a wasteful number, since it uses less digits than its factorization.

720618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120108.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 720618 is about 848.8922193070. The cubic root of 720618 is about 89.6537311916.

The spelling of 720618 in words is "seven hundred twenty thousand, six hundred eighteen".