1806436 has 6 divisors (see below), whose sum is σ = 3161270. Its totient is φ = 903216.

The previous prime is 1806421. The next prime is 1806461. The reversal of 1806436 is 6346081.

It can be written as a sum of positive squares in only one way, i.e., 1806336 + 100 = 1344^2 + 10^2 .

It is a super-2 number, since 2×1806436² = 6526422044192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225801 + ... + 225808.

2^1806436 is an apocalyptic number.

It is an amenable number.

1806436 is a deficient number, since it is larger than the sum of its proper divisors (1354834).

1806436 is a wasteful number, since it uses less digits than its factorization.

1806436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451613 (or 451611 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1806436 is about 1344.0372018661. The cubic root of 1806436 is about 121.7888491315.

The spelling of 1806436 in words is "one million, eight hundred six thousand, four hundred thirty-six".