1840203828 has 72 divisors (see below), whose sum is σ = 4933361160. Its totient is φ = 576368640.

The previous prime is 1840203817. The next prime is 1840203829. The reversal of 1840203828 is 8283020481.

It is a happy number.

1840203828 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 702356004 + 1137847824 = 26502^2 + 33732^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1840203792 and 1840203801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840203829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 431788 + ... + 436028.

It is an arithmetic number, because the mean of its divisors is an integer number (68518905).

Almost surely, 2^1840203828 is an apocalyptic number.

1840203828 is a gapful number since it is divisible by the number (18) 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 1840203828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466680580).

1840203828 is an abundant number, since it is smaller than the sum of its proper divisors (3093157332).

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

1840203828 is a wasteful number, since it uses less digits than its factorization.

1840203828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4977 (or 4972 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 1840203828 is about 42897.5969956360. The cubic root of 1840203828 is about 1225.4303811651.

The spelling of 1840203828 in words is "one billion, eight hundred forty million, two hundred three thousand, eight hundred twenty-eight".