1997190144 has 132 divisors (see below), whose sum is σ = 5923715044. Its totient is φ = 647626752.

The previous prime is 1997190131. The next prime is 1997190161. The reversal of 1997190144 is 4410917991.

It can be written as a sum of positive squares in 2 ways, for example, as 1841439744 + 155750400 = 42912^2 + 12480^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1997190144.

It is a congruent number.

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, 338064 + ... + 343920.

Almost surely, 2^1997190144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997190144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2961857522).

1997190144 is an abundant number, since it is smaller than the sum of its proper divisors (3926524900).

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

1997190144 is a wasteful number, since it uses less digits than its factorization.

1997190144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920 (or 5899 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 1997190144 is about 44689.9333631188. The cubic root of 1997190144 is about 1259.3307405742.

The spelling of 1997190144 in words is "one billion, nine hundred ninety-seven million, one hundred ninety thousand, one hundred forty-four".