1804159420 has 60 divisors (see below), whose sum is σ = 4420045224. Its totient is φ = 618552480.

The previous prime is 1804159403. The next prime is 1804159429. The reversal of 1804159420 is 249514081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1804159429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29235 + ... + 66805.

Almost surely, 2^1804159420 is an apocalyptic number.

1804159420 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 1804159420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2210022612).

1804159420 is an abundant number, since it is smaller than the sum of its proper divisors (2615885804).

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

1804159420 is an equidigital number, since it uses as much as digits as its factorization.

1804159420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37608 (or 37585 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1804159420 is about 42475.3978203854. The cubic root of 1804159420 is about 1217.3766573057.

The spelling of 1804159420 in words is "one billion, eight hundred four million, one hundred fifty-nine thousand, four hundred twenty".