7201720140 has 24 divisors (see below), whose sum is σ = 20164816560. Its totient is φ = 1920458688.

The previous prime is 7201720117. The next prime is 7201720147. The reversal of 7201720140 is 410271027.

It is a self number, because there is not a number n which added to its sum of digits gives 7201720140.

It is not an unprimeable number, because it can be changed into a prime (7201720147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60014275 + ... + 60014394.

It is an arithmetic number, because the mean of its divisors is an integer number (840200690).

Almost surely, 2^7201720140 is an apocalyptic number.

It is an amenable number.

7201720140 is an abundant number, since it is smaller than the sum of its proper divisors (12963096420).

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

7201720140 is a wasteful number, since it uses less digits than its factorization.

7201720140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120028681 (or 120028679 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 7201720140 is about 84862.9491592179. The cubic root of 7201720140 is about 1931.1325326066.

Adding to 7201720140 its reverse (410271027), we get a palindrome (7611991167).

The spelling of 7201720140 in words is "seven billion, two hundred one million, seven hundred twenty thousand, one hundred forty".