9399738390 has 128 divisors (see below), whose sum is σ = 26814136320. Its totient is φ = 2063308800.

The previous prime is 9399738289. The next prime is 9399738427. The reversal of 9399738390 is 938379939.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1159150 + ... + 1167230.

It is an arithmetic number, because the mean of its divisors is an integer number (209485440).

Almost surely, 2^9399738390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9399738390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13407068160).

9399738390 is an abundant number, since it is smaller than the sum of its proper divisors (17414397930).

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

9399738390 is a wasteful number, since it uses less digits than its factorization.

9399738390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8318.

The product of its (nonzero) digits is 9920232, while the sum is 60.

The square root of 9399738390 is about 96952.2479883783. The cubic root of 9399738390 is about 2110.4347157288.

The spelling of 9399738390 in words is "nine billion, three hundred ninety-nine million, seven hundred thirty-eight thousand, three hundred ninety".