9999426 has 16 divisors (see below), whose sum is σ = 20030400. Its totient is φ = 3327888.

The previous prime is 9999419. The next prime is 9999433. The reversal of 9999426 is 6249999.

It is an interprime number because it is at equal distance from previous prime (9999419) and next prime (9999433).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5635 + ... + 7193.

It is an arithmetic number, because the mean of its divisors is an integer number (1251900).

Almost surely, 2^9999426 is an apocalyptic number.

9999426 is an abundant number, since it is smaller than the sum of its proper divisors (10030974).

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

9999426 is a wasteful number, since it uses less digits than its factorization.

9999426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633.

The product of its digits is 314928, while the sum is 48.

The square root of 9999426 is about 3162.1869014971. The cubic root of 9999426 is about 215.4393467726.

The spelling of 9999426 in words is "nine million, nine hundred ninety-nine thousand, four hundred twenty-six".