3906278641 has 4 divisors (see below), whose sum is σ = 3917160000. Its totient is φ = 3895397284.

The previous prime is 3906278633. The next prime is 3906278657. The reversal of 3906278641 is 1468726093.

3906278641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3906278641 - 2³ = 3906278633 is a prime.

It is a super-2 number, since 2×3906278641² = 30518025642265613762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3906278591 and 3906278600.

It is not an unprimeable number, because it can be changed into a prime (3906278611) 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, 5440141 + ... + 5440858.

It is an arithmetic number, because the mean of its divisors is an integer number (979290000).

Almost surely, 2^3906278641 is an apocalyptic number.

It is an amenable number.

3906278641 is a deficient number, since it is larger than the sum of its proper divisors (10881359).

3906278641 is a wasteful number, since it uses less digits than its factorization.

3906278641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10881358.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 3906278641 is about 62500.2291275800. The cubic root of 3906278641 is about 1574.9051614684.

The spelling of 3906278641 in words is "three billion, nine hundred six million, two hundred seventy-eight thousand, six hundred forty-one".