997320 has 32 divisors (see below), whose sum is σ = 2992320. Its totient is φ = 265920.

The previous prime is 997319. The next prime is 997327. The reversal of 997320 is 23799.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997320.

It is not an unprimeable number, because it can be changed into a prime (997327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4036 + ... + 4275.

It is an arithmetic number, because the mean of its divisors is an integer number (93510).

2⁹⁹⁷³²⁰ is an apocalyptic number.

It is an amenable number.

997320 is an abundant number, since it is smaller than the sum of its proper divisors (1995000).

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

997320 is a wasteful number, since it uses less digits than its factorization.

997320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325 (or 8321 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 997320 is about 998.6591009949. The cubic root of 997320 is about 99.9105867432.

The spelling of 997320 in words is "nine hundred ninety-seven thousand, three hundred twenty".