1903213872 has 120 divisors (see below), whose sum is σ = 6135607296. Its totient is φ = 539457408.

The previous prime is 1903213849. The next prime is 1903213877. The reversal of 1903213872 is 2783123091.

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 (1903213877) 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, 120583 + ... + 135449.

Almost surely, 2^1903213872 is an apocalyptic number.

1903213872 is a gapful number since it is divisible by the number (12) 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 1903213872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3067803648).

1903213872 is an abundant number, since it is smaller than the sum of its proper divisors (4232393424).

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

1903213872 is a wasteful number, since it uses less digits than its factorization.

1903213872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15015 (or 15006 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1903213872 is about 43625.8394990859. The cubic root of 1903213872 is about 1239.2602837528.

The spelling of 1903213872 in words is "one billion, nine hundred three million, two hundred thirteen thousand, eight hundred seventy-two".