1903212444 has 192 divisors, whose sum is σ = 5509647360. Its totient is φ = 499322880.

The previous prime is 1903212361. The next prime is 1903212491. The reversal of 1903212444 is 4442123091.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11001142 + ... + 11001314.

It is an arithmetic number, because the mean of its divisors is an integer number (28696080).

Almost surely, 2^1903212444 is an apocalyptic number.

1903212444 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 1903212444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2754823680).

1903212444 is an abundant number, since it is smaller than the sum of its proper divisors (3606434916).

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

1903212444 is a wasteful number, since it uses less digits than its factorization.

1903212444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1903212444 is about 43625.8231326356. The cubic root of 1903212444 is about 1239.2599738096.

The spelling of 1903212444 in words is "one billion, nine hundred three million, two hundred twelve thousand, four hundred forty-four".