997836 has 36 divisors (see below), whose sum is σ = 2710008. Its totient is φ = 284928.

The previous prime is 997813. The next prime is 997877. The reversal of 997836 is 638799.

997836 = 118² + 119² + ... + 166².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a zygodrome in base 2.

It is an unprimeable number.

997836 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261 + ... + 1436.

It is an arithmetic number, because the mean of its divisors is an integer number (75278).

2⁹⁹⁷⁸³⁶ is an apocalyptic number.

It is an amenable number.

997836 is an abundant number, since it is smaller than the sum of its proper divisors (1712172).

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

997836 is a wasteful number, since it uses less digits than its factorization.

997836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718 (or 1709 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 997836 is about 998.9174140038. The cubic root of 997836 is about 99.9278145718.

The spelling of 997836 in words is "nine hundred ninety-seven thousand, eight hundred thirty-six".