618197320 has 32 divisors (see below), whose sum is σ = 1497940920. Its totient is φ = 228257280.

The previous prime is 618197317. The next prime is 618197387. The reversal of 618197320 is 23791816.

It can be written as a sum of positive squares in 4 ways, for example, as 348120964 + 270076356 = 18658^2 + 16434^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 618197320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593901 + ... + 594940.

Almost surely, 2^618197320 is an apocalyptic number.

It is an amenable number.

618197320 is an abundant number, since it is smaller than the sum of its proper divisors (879743600).

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

618197320 is a wasteful number, since it uses less digits than its factorization.

618197320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188865 (or 1188861 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 618197320 is about 24863.5741598025. The cubic root of 618197320 is about 851.8746720662.

The spelling of 618197320 in words is "six hundred eighteen million, one hundred ninety-seven thousand, three hundred twenty".