3946366640 has 20 divisors (see below), whose sum is σ = 9175302624. Its totient is φ = 1578546624.

The previous prime is 3946366607. The next prime is 3946366643. The reversal of 3946366640 is 466636493.

3946366640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (3946366643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24664712 + ... + 24664871.

Almost surely, 2^3946366640 is an apocalyptic number.

It is an amenable number.

3946366640 is an abundant number, since it is smaller than the sum of its proper divisors (5228935984).

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

3946366640 is a wasteful number, since it uses less digits than its factorization.

3946366640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49329596 (or 49329590 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 47.

The square root of 3946366640 is about 62820.1133395985. The cubic root of 3946366640 is about 1580.2742994366.

The spelling of 3946366640 in words is "three billion, nine hundred forty-six million, three hundred sixty-six thousand, six hundred forty".