1800019144 has 64 divisors (see below), whose sum is σ = 4230144000. Its totient is φ = 697588800.

The previous prime is 1800019129. The next prime is 1800019157. The reversal of 1800019144 is 4419100081.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 110007 + ... + 125305.

It is an arithmetic number, because the mean of its divisors is an integer number (66096000).

Almost surely, 2^1800019144 is an apocalyptic number.

1800019144 is a gapful number since it is divisible by the number (14) 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 1800019144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115072000).

1800019144 is an abundant number, since it is smaller than the sum of its proper divisors (2430124856).

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

1800019144 is a wasteful number, since it uses less digits than its factorization.

1800019144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15514 (or 15510 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1800019144 is about 42426.6324847966. The cubic root of 1800019144 is about 1216.4447116059. Note that the first 3 decimals are identical.

The spelling of 1800019144 in words is "one billion, eight hundred million, nineteen thousand, one hundred forty-four".