1808426 has 8 divisors (see below), whose sum is σ = 2872260. Its totient is φ = 851008.

The previous prime is 1808399. The next prime is 1808431. The reversal of 1808426 is 6248081.

It can be written as a sum of positive squares in 2 ways, for example, as 1442401 + 366025 = 1201^2 + 605^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26561 + ... + 26628.

2^1808426 is an apocalyptic number.

1808426 is a deficient number, since it is larger than the sum of its proper divisors (1063834).

1808426 is a wasteful number, since it uses less digits than its factorization.

1808426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53208.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1808426 is about 1344.7773049840. Note that the first 3 decimals coincide. The cubic root of 1808426 is about 121.8335542614.

The spelling of 1808426 in words is "one million, eight hundred eight thousand, four hundred twenty-six".