1604345418 has 96 divisors (see below), whose sum is σ = 3923092992. Its totient is φ = 470448000.

The previous prime is 1604345357. The next prime is 1604345443. The reversal of 1604345418 is 8145434061.

1604345418 is a `hidden beast` number, since 1 + 604 + 3 + 4 + 5 + 41 + 8 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 484368 + ... + 487668.

It is an arithmetic number, because the mean of its divisors is an integer number (40865552).

Almost surely, 2^1604345418 is an apocalyptic number.

1604345418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604345418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1961546496).

1604345418 is an abundant number, since it is smaller than the sum of its proper divisors (2318747574).

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

1604345418 is a wasteful number, since it uses less digits than its factorization.

1604345418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420 (or 3417 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1604345418 is about 40054.2808948057. The cubic root of 1604345418 is about 1170.6649781086.

Adding to 1604345418 its reverse (8145434061), we get a palindrome (9749779479).

The spelling of 1604345418 in words is "one billion, six hundred four million, three hundred forty-five thousand, four hundred eighteen".