9391998 has 64 divisors (see below), whose sum is σ = 24261120. Its totient is φ = 2352000.

The previous prime is 9391979. The next prime is 9392003. The reversal of 9391998 is 8991939.

It is a congruent number.

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, 13048 + ... + 13748.

It is an arithmetic number, because the mean of its divisors is an integer number (379080).

Almost surely, 2^9391998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9391998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12130560).

9391998 is an abundant number, since it is smaller than the sum of its proper divisors (14869122).

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

9391998 is a wasteful number, since it uses less digits than its factorization.

9391998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753.

The product of its digits is 157464, while the sum is 48.

The square root of 9391998 is about 3064.6366831975. The cubic root of 9391998 is about 210.9855264362.

The spelling of 9391998 in words is "nine million, three hundred ninety-one thousand, nine hundred ninety-eight".