9900426 has 32 divisors (see below), whose sum is σ = 21695040. Its totient is φ = 2998016.

The previous prime is 9900421. The next prime is 9900427. The reversal of 9900426 is 6240099.

It is a junction number, because it is equal to n+sod(n) for n = 9900393 and 9900402.

It is not an unprimeable number, because it can be changed into a prime (9900421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1285 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (677970).

Almost surely, 2^9900426 is an apocalyptic number.

9900426 is an abundant number, since it is smaller than the sum of its proper divisors (11794614).

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

9900426 is a wasteful number, since it uses less digits than its factorization.

9900426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 9900426 is about 3146.4942396261. The cubic root of 9900426 is about 214.7259967218.

The spelling of 9900426 in words is "nine million, nine hundred thousand, four hundred twenty-six".