1997718360 has 256 divisors, whose sum is σ = 7060608000. Its totient is φ = 447068160.

The previous prime is 1997718353. The next prime is 1997718361. The reversal of 1997718360 is 638177991.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997718361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 879306 + ... + 881574.

It is an arithmetic number, because the mean of its divisors is an integer number (27580500).

Almost surely, 2^1997718360 is an apocalyptic number.

1997718360 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 1997718360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3530304000).

1997718360 is an abundant number, since it is smaller than the sum of its proper divisors (5062889640).

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

1997718360 is a wasteful number, since it uses less digits than its factorization.

1997718360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 1997718360 is about 44695.8427597019. The cubic root of 1997718360 is about 1259.4417532075.

The spelling of 1997718360 in words is "one billion, nine hundred ninety-seven million, seven hundred eighteen thousand, three hundred sixty".