3999394240 has 56 divisors (see below), whose sum is σ = 9679728672. Its totient is φ = 1573524480.

The previous prime is 3999394229. The next prime is 3999394253. The reversal of 3999394240 is 424939993.

3999394240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 82924 + ... + 121963.

Almost surely, 2^3999394240 is an apocalyptic number.

It is an amenable number.

3999394240 is an abundant number, since it is smaller than the sum of its proper divisors (5680334432).

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

3999394240 is a wasteful number, since it uses less digits than its factorization.

3999394240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204965 (or 204955 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 52.

The square root of 3999394240 is about 63240.7640687555. The cubic root of 3999394240 is about 1587.3209159177.

The spelling of 3999394240 in words is "three billion, nine hundred ninety-nine million, three hundred ninety-four thousand, two hundred forty".