1597136748 has 12 divisors (see below), whose sum is σ = 3726652440. Its totient is φ = 532378912.

The previous prime is 1597136747. The next prime is 1597136777. The reversal of 1597136748 is 8476317951.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1597136748.

It is not an unprimeable number, because it can be changed into a prime (1597136741) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 66547353 + ... + 66547376.

It is an arithmetic number, because the mean of its divisors is an integer number (310554370).

Almost surely, 2^1597136748 is an apocalyptic number.

It is an amenable number.

1597136748 is an abundant number, since it is smaller than the sum of its proper divisors (2129515692).

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

1597136748 is a wasteful number, since it uses less digits than its factorization.

1597136748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133094736 (or 133094734 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 1597136748 is about 39964.1933235240. The cubic root of 1597136748 is about 1168.9089953922.

The spelling of 1597136748 in words is "one billion, five hundred ninety-seven million, one hundred thirty-six thousand, seven hundred forty-eight".