1801801802 has 8 divisors (see below), whose sum is σ = 2775748836. Its totient is φ = 876552192.

The previous prime is 1801801789. The next prime is 1801801843. The reversal of 1801801802 is 2081081081.

It can be written as a sum of positive squares in 2 ways, for example, as 1452448321 + 349353481 = 38111^2 + 18691^2 .

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

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, 12174263 + ... + 12174410.

Almost surely, 2^1801801802 is an apocalyptic number.

1801801802 is a deficient number, since it is larger than the sum of its proper divisors (973947034).

1801801802 is a wasteful number, since it uses less digits than its factorization.

1801801802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24348712.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 1801801802 is about 42447.6360001355. The cubic root of 1801801802 is about 1216.8461498228.

Adding to 1801801802 its reverse (2081081081), we get a palindrome (3882882883).

The spelling of 1801801802 in words is "one billion, eight hundred one million, eight hundred one thousand, eight hundred two".