1997496160 has 144 divisors (see below), whose sum is σ = 5324021136. Its totient is φ = 702336000.

The previous prime is 1997496143. The next prime is 1997496167. The reversal of 1997496160 is 616947991.

It is a junction number, because it is equal to n+sod(n) for n = 1997496098 and 1997496107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997496167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1690770 + ... + 1691950.

It is an arithmetic number, because the mean of its divisors is an integer number (36972369).

Almost surely, 2^1997496160 is an apocalyptic number.

1997496160 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 1997496160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2662010568).

1997496160 is an abundant number, since it is smaller than the sum of its proper divisors (3326524976).

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

1997496160 is a wasteful number, since it uses less digits than its factorization.

1997496160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 1997496160 is about 44693.3570007893. The cubic root of 1997496160 is about 1259.3950568798.

The spelling of 1997496160 in words is "one billion, nine hundred ninety-seven million, four hundred ninety-six thousand, one hundred sixty".