9390831620 has 96 divisors (see below), whose sum is σ = 22185485280. Its totient is φ = 3321077760.

The previous prime is 9390831607. The next prime is 9390831647. The reversal of 9390831620 is 261380939.

It can be written as a sum of positive squares in 16 ways, for example, as 9746884 + 9381084736 = 3122^2 + 96856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351950 + ... + 377690.

It is an arithmetic number, because the mean of its divisors is an integer number (231098805).

Almost surely, 2^9390831620 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 9390831620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11092742640).

9390831620 is an abundant number, since it is smaller than the sum of its proper divisors (12794653660).

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

9390831620 is a wasteful number, since it uses less digits than its factorization.

9390831620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25833 (or 25831 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 9390831620 is about 96906.3033037583. The cubic root of 9390831620 is about 2109.7679206871.

The spelling of 9390831620 in words is "nine billion, three hundred ninety million, eight hundred thirty-one thousand, six hundred twenty".