3843999990 has 96 divisors (see below), whose sum is σ = 10394800416. Its totient is φ = 1022077440.

The previous prime is 3843999923. The next prime is 3844000001. The reversal of 3843999990 is 999993483.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 904270 + ... + 908510.

It is an arithmetic number, because the mean of its divisors is an integer number (108279171).

Almost surely, 2^3843999990 is an apocalyptic number.

3843999990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3843999990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5197400208).

3843999990 is an abundant number, since it is smaller than the sum of its proper divisors (6550800426).

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

3843999990 is a wasteful number, since it uses less digits than its factorization.

3843999990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636 (or 4624 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 63.

The square root of 3843999990 is about 61999.9999193548. Note that the first 4 decimals coincide. The cubic root of 3843999990 is about 1566.4905980395.

The spelling of 3843999990 in words is "three billion, eight hundred forty-three million, nine hundred ninety-nine thousand, nine hundred ninety".