997830 has 24 divisors (see below), whose sum is σ = 2594592. Its totient is φ = 266064.

The previous prime is 997813. The next prime is 997877. The reversal of 997830 is 38799.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5454 + ... + 5633.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2⁹⁹⁷⁸³⁰ is an apocalyptic number.

997830 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

997830 is an abundant number, since it is smaller than the sum of its proper divisors (1596762).

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

997830 is a wasteful number, since it uses less digits than its factorization.

997830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100 (or 11097 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 997830 is about 998.9144107480. The cubic root of 997830 is about 99.9276142824.

The spelling of 997830 in words is "nine hundred ninety-seven thousand, eight hundred thirty".