997388 has 24 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 422928.

The previous prime is 997379. The next prime is 997391. The reversal of 997388 is 883799.

It is an Ulam number.

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997388.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4913 + ... + 5111.

It is an arithmetic number, because the mean of its divisors is an integer number (84000).

2⁹⁹⁷³⁸⁸ is an apocalyptic number.

It is an amenable number.

997388 is an abundant number, since it is smaller than the sum of its proper divisors (1018612).

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

997388 is a wasteful number, since it uses less digits than its factorization.

997388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 387 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 997388 is about 998.6931460664. The cubic root of 997388 is about 99.9128574171.

The spelling of 997388 in words is "nine hundred ninety-seven thousand, three hundred eighty-eight".