1868406 has 16 divisors (see below), whose sum is σ = 3765744. Its totient is φ = 617984.

The previous prime is 1868387. The next prime is 1868407. The reversal of 1868406 is 6048681.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315 + ... + 1958.

It is an arithmetic number, because the mean of its divisors is an integer number (235359).

2^1868406 is an apocalyptic number.

1868406 is an abundant number, since it is smaller than the sum of its proper divisors (1897338).

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

1868406 is a wasteful number, since it uses less digits than its factorization.

1868406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1868406 is about 1366.8964847420. The cubic root of 1868406 is about 123.1658810197.

The spelling of 1868406 in words is "one million, eight hundred sixty-eight thousand, four hundred six".