1597291998 has 32 divisors (see below), whose sum is σ = 3283754496. Its totient is φ = 517593888.

The previous prime is 1597291991. The next prime is 1597292003. The reversal of 1597291998 is 8991927951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597291991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340215 + ... + 344877.

It is an arithmetic number, because the mean of its divisors is an integer number (102617328).

Almost surely, 2^1597291998 is an apocalyptic number.

1597291998 is an abundant number, since it is smaller than the sum of its proper divisors (1686462498).

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

1597291998 is a wasteful number, since it uses less digits than its factorization.

1597291998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6248.

The product of its digits is 3674160, while the sum is 60.

The square root of 1597291998 is about 39966.1356400641. The cubic root of 1597291998 is about 1168.9468688433.

The spelling of 1597291998 in words is "one billion, five hundred ninety-seven million, two hundred ninety-one thousand, nine hundred ninety-eight".