997067808 has 144 divisors (see below), whose sum is σ = 3104311392. Its totient is φ = 301056000.

The previous prime is 997067791. The next prime is 997067831. The reversal of 997067808 is 808760799.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1555168 + ... + 1555808.

It is an arithmetic number, because the mean of its divisors is an integer number (21557718).

Almost surely, 2^997067808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997067808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552155696).

997067808 is an abundant number, since it is smaller than the sum of its proper divisors (2107243584).

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

997067808 is a wasteful number, since it uses less digits than its factorization.

997067808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 997067808 is about 31576.3805398909. The cubic root of 997067808 is about 999.0216458019.

The spelling of 997067808 in words is "nine hundred ninety-seven million, sixty-seven thousand, eight hundred eight".