3995278406 has 20 divisors (see below), whose sum is σ = 6991329612. Its totient is φ = 1712260116.

The previous prime is 3995278373. The next prime is 3995278429. The reversal of 3995278406 is 6048725993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 411200 + ... + 420803.

Almost surely, 2^3995278406 is an apocalyptic number.

3995278406 is a deficient number, since it is larger than the sum of its proper divisors (2996051206).

3995278406 is an frugal number, since it uses more digits than its factorization.

3995278406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832033 (or 832012 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 3995278406 is about 63208.2147034703. The cubic root of 3995278406 is about 1586.7762174455.

The spelling of 3995278406 in words is "three billion, nine hundred ninety-five million, two hundred seventy-eight thousand, four hundred six".