997810 has 32 divisors (see below), whose sum is σ = 2011392. Its totient is φ = 353280.

The previous prime is 997807. The next prime is 997811. The reversal of 997810 is 18799.

It is a super-3 number, since 3×997810³ = 2980333133389623000, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5074 + ... + 5266.

It is an arithmetic number, because the mean of its divisors is an integer number (62856).

2⁹⁹⁷⁸¹⁰ is an apocalyptic number.

997810 is an abundant number, since it is smaller than the sum of its proper divisors (1013582).

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

997810 is a wasteful number, since it uses less digits than its factorization.

997810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 997810 is about 998.9043998301. The cubic root of 997810 is about 99.9269466451.

The spelling of 997810 in words is "nine hundred ninety-seven thousand, eight hundred ten".