618384906 has 48 divisors (see below), whose sum is σ = 1414333440. Its totient is φ = 194728320.

The previous prime is 618384901. The next prime is 618384913. The reversal of 618384906 is 609483816.

618384906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (618384901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128626 + ... + 133346.

It is an arithmetic number, because the mean of its divisors is an integer number (29465280).

Almost surely, 2^618384906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618384906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707166720).

618384906 is an abundant number, since it is smaller than the sum of its proper divisors (795948534).

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

618384906 is a wasteful number, since it uses less digits than its factorization.

618384906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131 (or 5128 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 618384906 is about 24867.3461792770. The cubic root of 618384906 is about 851.9608277302.

The spelling of 618384906 in words is "six hundred eighteen million, three hundred eighty-four thousand, nine hundred six".