9994215 has 64 divisors (see below), whose sum is σ = 21150720. Its totient is φ = 3901440.

The previous prime is 9994207. The next prime is 9994219. The reversal of 9994215 is 5124999.

It is not a de Polignac number, because 9994215 - 2³ = 9994207 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

9994215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9994219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19381 + ... + 19889.

It is an arithmetic number, because the mean of its divisors is an integer number (330480).

Almost surely, 2^9994215 is an apocalyptic number.

9994215 is an abundant number, since it is smaller than the sum of its proper divisors (11156505).

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

9994215 is a wasteful number, since it uses less digits than its factorization.

9994215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552.

The product of its digits is 29160, while the sum is 39.

The square root of 9994215 is about 3161.3628390300. The cubic root of 9994215 is about 215.4019163071.

The spelling of 9994215 in words is "nine million, nine hundred ninety-four thousand, two hundred fifteen".