997408 has 24 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 490560.

The previous prime is 997391. The next prime is 997427. The reversal of 997408 is 804799.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (83160).

2⁹⁹⁷⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

997408 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

997408 is a wasteful number, since it uses less digits than its factorization.

997408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 997408 is about 998.7031591018. The cubic root of 997408 is about 99.9135252427.

The spelling of 997408 in words is "nine hundred ninety-seven thousand, four hundred eight".