1997598330 has 192 divisors, whose sum is σ = 6430814208. Its totient is φ = 418936320.

The previous prime is 1997598313. The next prime is 1997598331. The reversal of 1997598330 is 338957991.

1997598330 is a `hidden beast` number, since 19 + 9 + 7 + 598 + 3 + 30 = 666.

1997598330 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1997598331) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1563652 + ... + 1564928.

It is an arithmetic number, because the mean of its divisors is an integer number (33493824).

Almost surely, 2^1997598330 is an apocalyptic number.

1997598330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a pronic number, being equal to 44694×44695.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997598330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3215407104).

1997598330 is an abundant number, since it is smaller than the sum of its proper divisors (4433215878).

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

1997598330 is a wasteful number, since it uses less digits than its factorization.

1997598330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The square root of 1997598330 is about 44694.4999972032. The cubic root of 1997598330 is about 1259.4165287941.

The spelling of 1997598330 in words is "one billion, nine hundred ninety-seven million, five hundred ninety-eight thousand, three hundred thirty".