1868634 has 12 divisors (see below), whose sum is σ = 4048746. Its totient is φ = 622872.

The previous prime is 1868627. The next prime is 1868639. The reversal of 1868634 is 4368681.

It is a happy number.

1868634 is a `hidden beast` number, since 18 + 6 + 8 + 634 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1830609 + 38025 = 1353^2 + 195^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1868639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51889 + ... + 51924.

2^1868634 is an apocalyptic number.

1868634 is an abundant number, since it is smaller than the sum of its proper divisors (2180112).

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

1868634 is a wasteful number, since it uses less digits than its factorization.

1868634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103821 (or 103818 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1868634 is about 1366.9798828074. The cubic root of 1868634 is about 123.1708907586.

The spelling of 1868634 in words is "one million, eight hundred sixty-eight thousand, six hundred thirty-four".