997028 has 6 divisors (see below), whose sum is σ = 1744806. Its totient is φ = 498512.

The previous prime is 997021. The next prime is 997037. The reversal of 997028 is 820799.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 1024 = 998^2 + 32^2 .

It is a super-3 number, since 3×997028³ = 2973331416302897856, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (997021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124625 + ... + 124632.

It is an arithmetic number, because the mean of its divisors is an integer number (290801).

2⁹⁹⁷⁰²⁸ is an apocalyptic number.

It is an amenable number.

997028 is a deficient number, since it is larger than the sum of its proper divisors (747778).

997028 is a wasteful number, since it uses less digits than its factorization.

997028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249261 (or 249259 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 997028 is about 998.5128942583. The cubic root of 997028 is about 99.9008350289.

The spelling of 997028 in words is "nine hundred ninety-seven thousand, twenty-eight".