618446320 has 20 divisors (see below), whose sum is σ = 1437887880. Its totient is φ = 247378496.

The previous prime is 618446303. The next prime is 618446329. The reversal of 618446320 is 23644816.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618446329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3865210 + ... + 3865369.

It is an arithmetic number, because the mean of its divisors is an integer number (71894394).

Almost surely, 2^618446320 is an apocalyptic number.

It is an amenable number.

618446320 is an abundant number, since it is smaller than the sum of its proper divisors (819441560).

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

618446320 is a wasteful number, since it uses less digits than its factorization.

618446320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730592 (or 7730586 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 618446320 is about 24868.5809808280. The cubic root of 618446320 is about 851.9890305479.

The spelling of 618446320 in words is "six hundred eighteen million, four hundred forty-six thousand, three hundred twenty".