720100 has 36 divisors (see below), whose sum is σ = 1649200. Its totient is φ = 272160.

The previous prime is 720091. The next prime is 720101. The reversal of 720100 is 1027.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (720101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1711 + ... + 2089.

2⁷²⁰¹⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824600).

720100 is an abundant number, since it is smaller than the sum of its proper divisors (929100).

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

720100 is a wasteful number, since it uses less digits than its factorization.

720100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 720100 is about 848.5870609431. The cubic root of 720100 is about 89.6322441879.

720100 divided by its sum of digits (10) gives a triangular number (72010 = T₃₇₉).

Adding to 720100 its reverse (1027), we get a palindrome (721127).

It can be divided in two parts, 720 and 100, that added together give a triangular number (820 = T₄₀).

The spelling of 720100 in words is "seven hundred twenty thousand, one hundred", and thus it is an iban number.