3405816918 has 48 divisors (see below), whose sum is σ = 8877323520. Its totient is φ = 921874608.

The previous prime is 3405816917. The next prime is 3405816991. The reversal of 3405816918 is 8196185043.

3405816918 is a `hidden beast` number, since 3 + 4 + 0 + 581 + 69 + 1 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3405816913) 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, 708930 + ... + 713717.

It is an arithmetic number, because the mean of its divisors is an integer number (184944240).

Almost surely, 2^3405816918 is an apocalyptic number.

3405816918 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3405816918 is an abundant number, since it is smaller than the sum of its proper divisors (5471506602).

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

3405816918 is a wasteful number, since it uses less digits than its factorization.

3405816918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422681 (or 1422678 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 3405816918 is about 58359.3772927710. The cubic root of 3405816918 is about 1504.5516437228.

The spelling of 3405816918 in words is "three billion, four hundred five million, eight hundred sixteen thousand, nine hundred eighteen".