1808042422 has 4 divisors (see below), whose sum is σ = 2712063636. Its totient is φ = 904021210.

The previous prime is 1808042399. The next prime is 1808042471. The reversal of 1808042422 is 2242408081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2242408081 = 2551 ⋅879031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452010604 + ... + 452010607.

It is an arithmetic number, because the mean of its divisors is an integer number (678015909).

Almost surely, 2^1808042422 is an apocalyptic number.

1808042422 is a deficient number, since it is larger than the sum of its proper divisors (904021214).

1808042422 is an equidigital number, since it uses as much as digits as its factorization.

1808042422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904021213.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 1808042422 is about 42521.0820887710. The cubic root of 1808042422 is about 1218.2493977647.

The spelling of 1808042422 in words is "one billion, eight hundred eight million, forty-two thousand, four hundred twenty-two".