9903720 has 32 divisors (see below), whose sum is σ = 29711520. Its totient is φ = 2640960.

The previous prime is 9903713. The next prime is 9903721. The reversal of 9903720 is 273099.

9903720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9903721) 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, 41146 + ... + 41385.

It is an arithmetic number, because the mean of its divisors is an integer number (928485).

Almost surely, 2^9903720 is an apocalyptic number.

It is an amenable number.

9903720 is an abundant number, since it is smaller than the sum of its proper divisors (19807800).

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

9903720 is a wasteful number, since it uses less digits than its factorization.

9903720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82545 (or 82541 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 9903720 is about 3147.0176357942. The cubic root of 9903720 is about 214.7498081216.

The spelling of 9903720 in words is "nine million, nine hundred three thousand, seven hundred twenty".