9999408 has 40 divisors (see below), whose sum is σ = 26467056. Its totient is φ = 3251200.

The previous prime is 9999401. The next prime is 9999419. The reversal of 9999408 is 8049999.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (9999401) 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, 573 + ... + 4508.

Almost surely, 2^9999408 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 9999408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13233528).

9999408 is an abundant number, since it is smaller than the sum of its proper divisors (16467648).

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

9999408 is a wasteful number, since it uses less digits than its factorization.

9999408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133 (or 5127 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 9999408 is about 3162.1840553643. The cubic root of 9999408 is about 215.4392175015.

The spelling of 9999408 in words is "nine million, nine hundred ninety-nine thousand, four hundred eight".