1813668 has 24 divisors (see below), whose sum is σ = 4253760. Its totient is φ = 601440.

The previous prime is 1813667. The next prime is 1813673. The reversal of 1813668 is 8663181.

It is a super-2 number, since 2×1813668² = 6578783228448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1813667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4098 + ... + 4518.

It is an arithmetic number, because the mean of its divisors is an integer number (177240).

2^1813668 is an apocalyptic number.

It is an amenable number.

1813668 is an abundant number, since it is smaller than the sum of its proper divisors (2440092).

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

1813668 is a wasteful number, since it uses less digits than its factorization.

1813668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 785 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1813668 is about 1346.7249162320. The cubic root of 1813668 is about 121.9511584481.

The spelling of 1813668 in words is "one million, eight hundred thirteen thousand, six hundred sixty-eight".