1856404 has 24 divisors (see below), whose sum is σ = 3661056. Its totient is φ = 816000.

The previous prime is 1856363. The next prime is 1856411. The reversal of 1856404 is 4046581.

It is a super-2 number, since 2×1856404² = 6892471622432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684 + ... + 2044.

It is an arithmetic number, because the mean of its divisors is an integer number (152544).

2^1856404 is an apocalyptic number.

It is an amenable number.

1856404 is a deficient number, since it is larger than the sum of its proper divisors (1804652).

1856404 is a wasteful number, since it uses less digits than its factorization.

1856404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407 (or 1405 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1856404 is about 1362.4991743117. The cubic root of 1856404 is about 122.9015891621.

The spelling of 1856404 in words is "one million, eight hundred fifty-six thousand, four hundred four".