997040 has 60 divisors (see below), whose sum is σ = 2572752. Its totient is φ = 359040.

The previous prime is 997037. The next prime is 997043. The reversal of 997040 is 40799.

997040 = T₃₄₅ + T₃₄₆ + ... + T₃₆₀.

It is an interprime number because it is at equal distance from previous prime (997037) and next prime (997043).

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 996994 and 997012.

It is not an unprimeable number, because it can be changed into a prime (997043) 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 in 11 ways as a sum of consecutive naturals, for example, 9629 + ... + 9731.

2⁹⁹⁷⁰⁴⁰ 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 997040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286376).

997040 is an abundant number, since it is smaller than the sum of its proper divisors (1575712).

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

997040 is a wasteful number, since it uses less digits than its factorization.

997040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 997040 is about 998.5189031761. The cubic root of 997040 is about 99.9012358218.

The spelling of 997040 in words is "nine hundred ninety-seven thousand, forty".