1808861420 has 48 divisors (see below), whose sum is σ = 3854121600. Its totient is φ = 713007360.

The previous prime is 1808861407. The next prime is 1808861437. The reversal of 1808861420 is 241688081.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309130 + ... + 1310510.

It is an arithmetic number, because the mean of its divisors is an integer number (80294200).

Almost surely, 2^1808861420 is an apocalyptic number.

1808861420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1808861420 is an abundant number, since it is smaller than the sum of its proper divisors (2045260180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1808861420 is a wasteful number, since it uses less digits than its factorization.

1808861420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298 (or 2296 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 1808861420 is about 42530.7114918149. The cubic root of 1808861420 is about 1218.4333155008.

The spelling of 1808861420 in words is "one billion, eight hundred eight million, eight hundred sixty-one thousand, four hundred twenty".