1806440107 has 4 divisors (see below), whose sum is σ = 1807214760. Its totient is φ = 1805665456.

The previous prime is 1806440093. The next prime is 1806440117. The reversal of 1806440107 is 7010446081.

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

It is a cyclic number.

It is not a de Polignac number, because 1806440107 - 2⁷ = 1806439979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1806440117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383818 + ... + 388495.

It is an arithmetic number, because the mean of its divisors is an integer number (451803690).

Almost surely, 2^1806440107 is an apocalyptic number.

1806440107 is a deficient number, since it is larger than the sum of its proper divisors (774653).

1806440107 is an equidigital number, since it uses as much as digits as its factorization.

1806440107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774652.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1806440107 is about 42502.2364940952. The cubic root of 1806440107 is about 1217.8894142856.

Adding to 1806440107 its reverse (7010446081), we get a palindrome (8816886188).

The spelling of 1806440107 in words is "one billion, eight hundred six million, four hundred forty thousand, one hundred seven".