9997830 has 40 divisors (see below), whose sum is σ = 26885232. Its totient is φ = 2665872.

The previous prime is 9997829. The next prime is 9997831. The reversal of 9997830 is 387999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9997829) and next prime (9997831).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997831) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5362 + ... + 6981.

Almost surely, 2^9997830 is an apocalyptic number.

9997830 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9997830 is an abundant number, since it is smaller than the sum of its proper divisors (16887402).

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

9997830 is a wasteful number, since it uses less digits than its factorization.

9997830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12362 (or 12353 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9997830 is about 3161.9345344267. The cubic root of 9997830 is about 215.4278841316.

The spelling of 9997830 in words is "nine million, nine hundred ninety-seven thousand, eight hundred thirty".