1808057 has 4 divisors (see below), whose sum is σ = 1811700. Its totient is φ = 1804416.

The previous prime is 1808041. The next prime is 1808071. The reversal of 1808057 is 7508081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 606841 + 1201216 = 779^2 + 1096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1808057 - 2⁴ = 1808041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (452925).

2^1808057 is an apocalyptic number.

It is an amenable number.

1808057 is a deficient number, since it is larger than the sum of its proper divisors (3643).

1808057 is an equidigital number, since it uses as much as digits as its factorization.

1808057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 1808057 is about 1344.6401005474. The cubic root of 1808057 is about 121.8252671949.

The spelling of 1808057 in words is "one million, eight hundred eight thousand, fifty-seven".