1997568 has 108 divisors (see below), whose sum is σ = 6275080. Its totient is φ = 626688.

The previous prime is 1997557. The next prime is 1997587. The reversal of 1997568 is 8657991.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (108).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117496 + ... + 117512.

2^1997568 is an apocalyptic number.

1997568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3137540).

1997568 is an abundant number, since it is smaller than the sum of its proper divisors (4277512).

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

1997568 is an equidigital number, since it uses as much as digits as its factorization.

1997568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 22 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1997568 is about 1413.3534589762. The cubic root of 1997568 is about 125.9410154757.

The spelling of 1997568 in words is "one million, nine hundred ninety-seven thousand, five hundred sixty-eight".