1597988 has 36 divisors (see below), whose sum is σ = 3370752. Its totient is φ = 660240.

The previous prime is 1597979. The next prime is 1598011. The reversal of 1597988 is 8897951.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5945 + ... + 6207.

It is an arithmetic number, because the mean of its divisors is an integer number (93632).

2^1597988 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 1597988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1685376).

1597988 is an abundant number, since it is smaller than the sum of its proper divisors (1772764).

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

1597988 is a wasteful number, since it uses less digits than its factorization.

1597988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 303 counting only the distinct ones).

The product of its digits is 181440, while the sum is 47.

The square root of 1597988 is about 1264.1155010520. The cubic root of 1597988 is about 116.9116629333.

The spelling of 1597988 in words is "one million, five hundred ninety-seven thousand, nine hundred eighty-eight".