3994811844 has 24 divisors (see below), whose sum is σ = 9869535648. Its totient is φ = 1253274240.

The previous prime is 3994811837. The next prime is 3994811897. The reversal of 3994811844 is 4481184993.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9791002 + ... + 9791409.

It is an arithmetic number, because the mean of its divisors is an integer number (411230652).

Almost surely, 2^3994811844 is an apocalyptic number.

3994811844 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3994811844 is an abundant number, since it is smaller than the sum of its proper divisors (5874723804).

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

3994811844 is a wasteful number, since it uses less digits than its factorization.

3994811844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19582435 (or 19582433 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 3994811844 is about 63204.5239203651. The cubic root of 3994811844 is about 1586.7144480075.

The spelling of 3994811844 in words is "three billion, nine hundred ninety-four million, eight hundred eleven thousand, eight hundred forty-four".