1997750560 has 96 divisors (see below), whose sum is σ = 5303854080. Its totient is φ = 705543168.

The previous prime is 1997750507. The next prime is 1997750567. The reversal of 1997750560 is 650577991.

It is not an unprimeable number, because it can be changed into a prime (1997750567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26961 + ... + 68719.

It is an arithmetic number, because the mean of its divisors is an integer number (55248480).

Almost surely, 2^1997750560 is an apocalyptic number.

1997750560 is a gapful number since it is divisible by the number (10) 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 1997750560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2651927040).

1997750560 is an abundant number, since it is smaller than the sum of its proper divisors (3306103520).

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

1997750560 is a wasteful number, since it uses less digits than its factorization.

1997750560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41810 (or 41802 counting only the distinct ones).

The product of its (nonzero) digits is 595350, while the sum is 49.

The square root of 1997750560 is about 44696.2029707222. The cubic root of 1997750560 is about 1259.4485198948.

The spelling of 1997750560 in words is "one billion, nine hundred ninety-seven million, seven hundred fifty thousand, five hundred sixty".