1997340 has 24 divisors (see below), whose sum is σ = 5592720. Its totient is φ = 532608.

The previous prime is 1997339. The next prime is 1997341. The reversal of 1997340 is 437991.

It is an interprime number because it is at equal distance from previous prime (1997339) and next prime (1997341).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16585 + ... + 16704.

It is an arithmetic number, because the mean of its divisors is an integer number (233030).

2^1997340 is an apocalyptic number.

1997340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997340 is an abundant number, since it is smaller than the sum of its proper divisors (3595380).

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

1997340 is a wasteful number, since it uses less digits than its factorization.

1997340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33301 (or 33299 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1997340 is about 1413.2727974457. The cubic root of 1997340 is about 125.9362237082.

The spelling of 1997340 in words is "one million, nine hundred ninety-seven thousand, three hundred forty".