997824 has 28 divisors (see below), whose sum is σ = 2640584. Its totient is φ = 332544.

The previous prime is 997813. The next prime is 997877. The reversal of 997824 is 428799.

997824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

997824 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 3 ways as a sum of consecutive naturals, for example, 2407 + ... + 2790.

2⁹⁹⁷⁸²⁴ is an apocalyptic number.

It is an amenable number.

997824 is an abundant number, since it is smaller than the sum of its proper divisors (1642760).

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

997824 is a wasteful number, since it uses less digits than its factorization.

997824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5212 (or 5202 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 997824 is about 998.9114074832. The cubic root of 997824 is about 99.9274139921.

The spelling of 997824 in words is "nine hundred ninety-seven thousand, eight hundred twenty-four".