1805868468 has 18 divisors (see below), whose sum is σ = 4564834274. Its totient is φ = 601956144.

The previous prime is 1805868443. The next prime is 1805868569. The reversal of 1805868468 is 8648685081.

1805868468 is a `hidden beast` number, since 18 + 0 + 586 + 8 + 46 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1268926884 + 536941584 = 35622^2 + 23172^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1805868468² = 6522321847433334048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25081471 + ... + 25081542.

Almost surely, 2^1805868468 is an apocalyptic number.

1805868468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1805868468 is an abundant number, since it is smaller than the sum of its proper divisors (2758965806).

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

1805868468 is a wasteful number, since it uses less digits than its factorization.

1805868468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50163023 (or 50163018 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The square root of 1805868468 is about 42495.5111511793. The cubic root of 1805868468 is about 1217.7609357137.

It can be divided in two parts, 1805868 and 468, that added together give a square (1806336 = 1344²).

The spelling of 1805868468 in words is "one billion, eight hundred five million, eight hundred sixty-eight thousand, four hundred sixty-eight".