9999390 has 32 divisors (see below), whose sum is σ = 24170400. Its totient is φ = 2647424.

The previous prime is 9999347. The next prime is 9999397. The reversal of 9999390 is 939999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999397) 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, 3352 + ... + 5588.

It is an arithmetic number, because the mean of its divisors is an integer number (755325).

Almost surely, 2^9999390 is an apocalyptic number.

9999390 is an abundant number, since it is smaller than the sum of its proper divisors (14171010).

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

9999390 is a wasteful number, since it uses less digits than its factorization.

9999390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 177147, while the sum is 48.

The square root of 9999390 is about 3162.1812092288. The cubic root of 9999390 is about 215.4390882302.

The spelling of 9999390 in words is "nine million, nine hundred ninety-nine thousand, three hundred ninety".