1813726468 has 24 divisors (see below), whose sum is σ = 3285336600. Its totient is φ = 875094528.

The previous prime is 1813726459. The next prime is 1813726507. The reversal of 1813726468 is 8646273181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 326235844 + 1487490624 = 18062^2 + 38568^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277138 + ... + 283606.

It is an arithmetic number, because the mean of its divisors is an integer number (136889025).

Almost surely, 2^1813726468 is an apocalyptic number.

It is an amenable number.

1813726468 is a deficient number, since it is larger than the sum of its proper divisors (1471610132).

1813726468 is a wasteful number, since it uses less digits than its factorization.

1813726468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8919 (or 8917 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 1813726468 is about 42587.8676150849. The cubic root of 1813726468 is about 1219.5246889810.

The spelling of 1813726468 in words is "one billion, eight hundred thirteen million, seven hundred twenty-six thousand, four hundred sixty-eight".