1597086728 has 16 divisors (see below), whose sum is σ = 3005123280. Its totient is φ = 795720528.

The previous prime is 1597086727. The next prime is 1597086749. The reversal of 1597086728 is 8276807951.

It is a self number, because there is not a number n which added to its sum of digits gives 1597086728.

It is not an unprimeable number, because it can be changed into a prime (1597086727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350450 + ... + 354977.

It is an arithmetic number, because the mean of its divisors is an integer number (187820205).

Almost surely, 2^1597086728 is an apocalyptic number.

It is an amenable number.

1597086728 is a deficient number, since it is larger than the sum of its proper divisors (1408036552).

1597086728 is a wasteful number, since it uses less digits than its factorization.

1597086728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705716 (or 705712 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The square root of 1597086728 is about 39963.5675084195. The cubic root of 1597086728 is about 1168.8967924216.

The spelling of 1597086728 in words is "one billion, five hundred ninety-seven million, eighty-six thousand, seven hundred twenty-eight".