1868404 has 6 divisors (see below), whose sum is σ = 3269714. Its totient is φ = 934200.

The previous prime is 1868387. The next prime is 1868407. The reversal of 1868404 is 4048681.

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 204304 = 1290^2 + 452^2 .

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 as a sum of consecutive naturals, namely, 233547 + ... + 233554.

2^1868404 is an apocalyptic number.

It is an amenable number.

1868404 is a deficient number, since it is larger than the sum of its proper divisors (1401310).

1868404 is a wasteful number, since it uses less digits than its factorization.

1868404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467105 (or 467103 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1868404 is about 1366.8957531575. The cubic root of 1868404 is about 123.1658370728.

The spelling of 1868404 in words is "one million, eight hundred sixty-eight thousand, four hundred four".