9906406 has 8 divisors (see below), whose sum is σ = 14937984. Its totient is φ = 4927080.

The previous prime is 9906401. The next prime is 9906439. The reversal of 9906406 is 6046099.

9906406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9906401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12585 + ... + 13348.

It is an arithmetic number, because the mean of its divisors is an integer number (1867248).

Almost surely, 2^9906406 is an apocalyptic number.

9906406 is a deficient number, since it is larger than the sum of its proper divisors (5031578).

9906406 is a wasteful number, since it uses less digits than its factorization.

9906406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26126.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 9906406 is about 3147.4443601119. Note that the first 3 decimals coincide. The cubic root of 9906406 is about 214.7692205526.

It can be divided in two parts, 990 and 6406, that added together give a square (7396 = 86²).

The spelling of 9906406 in words is "nine million, nine hundred six thousand, four hundred six".