1831668 has 12 divisors (see below), whose sum is σ = 4273920. Its totient is φ = 610552.

The previous prime is 1831667. The next prime is 1831673. The reversal of 1831668 is 8661381.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1831667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76308 + ... + 76331.

It is an arithmetic number, because the mean of its divisors is an integer number (356160).

2^1831668 is an apocalyptic number.

It is an amenable number.

1831668 is an abundant number, since it is smaller than the sum of its proper divisors (2442252).

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

1831668 is a wasteful number, since it uses less digits than its factorization.

1831668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152646 (or 152644 counting only the distinct ones).

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

The square root of 1831668 is about 1353.3912959673. The cubic root of 1831668 is about 122.3532714959.

The spelling of 1831668 in words is "one million, eight hundred thirty-one thousand, six hundred sixty-eight".