618318920 has 32 divisors (see below), whose sum is σ = 1392190200. Its totient is φ = 247154688.

The previous prime is 618318853. The next prime is 618318929. The reversal of 618318920 is 29813816.

It can be written as a sum of positive squares in 4 ways, for example, as 529092004 + 89226916 = 23002^2 + 9446^2 .

It is not an unprimeable number, because it can be changed into a prime (618318929) by changing a digit.

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, 63326 + ... + 72434.

Almost surely, 2^618318920 is an apocalyptic number.

It is an amenable number.

618318920 is an abundant number, since it is smaller than the sum of its proper divisors (773871280).

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

618318920 is a wasteful number, since it uses less digits than its factorization.

618318920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10817 (or 10813 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 618318920 is about 24866.0193838901. The cubic root of 618318920 is about 851.9305232567.

The spelling of 618318920 in words is "six hundred eighteen million, three hundred eighteen thousand, nine hundred twenty".