1808229420 has 240 divisors, whose sum is σ = 5854464000. Its totient is φ = 467026560.

The previous prime is 1808229403. The next prime is 1808229427. The reversal of 1808229420 is 249228081.

1808229420 is a `hidden beast` number, since 1 + 8 + 0 + 8 + 229 + 420 = 666.

1808229420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1808229427) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9086481 + ... + 9086679.

It is an arithmetic number, because the mean of its divisors is an integer number (24393600).

Almost surely, 2^1808229420 is an apocalyptic number.

1808229420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1808229420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2927232000).

1808229420 is an abundant number, since it is smaller than the sum of its proper divisors (4046234580).

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

1808229420 is a wasteful number, since it uses less digits than its factorization.

1808229420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1808229420 is about 42523.2809176338. The cubic root of 1808229420 is about 1218.2913957372.

The spelling of 1808229420 in words is "one billion, eight hundred eight million, two hundred twenty-nine thousand, four hundred twenty".