720140 has 12 divisors (see below), whose sum is σ = 1512336. Its totient is φ = 288048.

The previous prime is 720133. The next prime is 720151. The reversal of 720140 is 41027.

It is a happy number.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17984 + ... + 18023.

It is an arithmetic number, because the mean of its divisors is an integer number (126028).

2⁷²⁰¹⁴⁰ is an apocalyptic number.

It is an amenable number.

720140 is an abundant number, since it is smaller than the sum of its proper divisors (792196).

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

720140 is a wasteful number, since it uses less digits than its factorization.

720140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36016 (or 36014 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 720140 is about 848.6106292052. The cubic root of 720140 is about 89.6339037830.

Adding to 720140 its reverse (41027), we get a palindrome (761167).

The spelling of 720140 in words is "seven hundred twenty thousand, one hundred forty", and thus it is an iban number.