720103900 has 72 divisors (see below), whose sum is σ = 1591675904. Its totient is φ = 282744000.

The previous prime is 720103897. The next prime is 720103907. The reversal of 720103900 is 9301027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720103907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1555069 + ... + 1555531.

Almost surely, 2^720103900 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 720103900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795837952).

720103900 is an abundant number, since it is smaller than the sum of its proper divisors (871572004).

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

720103900 is a wasteful number, since it uses less digits than its factorization.

720103900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 720103900 is about 26834.7517223469. The cubic root of 720103900 is about 896.3240600112.

Adding to 720103900 its reverse (9301027), we get a palindrome (729404927).

The spelling of 720103900 in words is "seven hundred twenty million, one hundred three thousand, nine hundred".