9903420 has 72 divisors (see below), whose sum is σ = 30873024. Its totient is φ = 2567808.

The previous prime is 9903407. The next prime is 9903431. The reversal of 9903420 is 243099.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5917 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (428792).

Almost surely, 2^9903420 is an apocalyptic number.

9903420 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9903420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15436512).

9903420 is an abundant number, since it is smaller than the sum of its proper divisors (20969604).

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

9903420 is a wasteful number, since it uses less digits than its factorization.

9903420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 9903420 is about 3146.9699712581. The cubic root of 9903420 is about 214.7476397245.

The spelling of 9903420 in words is "nine million, nine hundred three thousand, four hundred twenty".