720180 has 36 divisors (see below), whose sum is σ = 2185092. Its totient is φ = 192000.

The previous prime is 720179. The next prime is 720193. The reversal of 720180 is 81027.

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 599076 = 348^2 + 774^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1821 + ... + 2180.

It is an arithmetic number, because the mean of its divisors is an integer number (60697).

2⁷²⁰¹⁸⁰ is an apocalyptic number.

It is an amenable number.

720180 is an abundant number, since it is smaller than the sum of its proper divisors (1464912).

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

720180 is a wasteful number, since it uses less digits than its factorization.

720180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016 (or 4011 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 720180 is about 848.6341968127. The cubic root of 720180 is about 89.6355633167.

It can be divided in two parts, 720 and 180, that multiplied together give a square (129600 = 360²).

The spelling of 720180 in words is "seven hundred twenty thousand, one hundred eighty".