It is a self number, because there is not a number n which added to its sum of digits gives 1000003920.
It is a congruent number.
It is an unprimeable number.
Almost surely, 21000003920 is an apocalyptic number.
1000003920 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 1000003920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661518656).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1000003920 is a wasteful number, since it uses less digits than its factorization.
1000003920 is an evil number, because the sum of its binary digits is even.
The square root of 1000003920 is about 31622.8385822652. The cubic root of 1000003920 is about 1000.0013066650.
Adding to 1000003920 its reverse (293000001), we get a palindrome (1293003921).
The spelling of 1000003920 in words is "one billion, three thousand, nine hundred twenty".