1597990680 has 320 divisors, whose sum is σ = 6311844000. Its totient is φ = 357488640.

The previous prime is 1597990679. The next prime is 1597990699. The reversal of 1597990680 is 860997951.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 461596 + ... + 465044.

Almost surely, 2^1597990680 is an apocalyptic number.

1597990680 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 1597990680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3155922000).

1597990680 is an abundant number, since it is smaller than the sum of its proper divisors (4713853320).

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

1597990680 is a wasteful number, since it uses less digits than its factorization.

1597990680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3496 (or 3483 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 1597990680 is about 39974.8756095626. The cubic root of 1597990680 is about 1169.1172829115.

The spelling of 1597990680 in words is "one billion, five hundred ninety-seven million, nine hundred ninety thousand, six hundred eighty".