3990706 has 4 divisors (see below), whose sum is σ = 5986062. Its totient is φ = 1995352.

The previous prime is 3990689. The next prime is 3990731. The reversal of 3990706 is 6070993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6070993 = 41 ⋅148073.

It can be written as a sum of positive squares in only one way, i.e., 2907025 + 1083681 = 1705^2 + 1041^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997675 + ... + 997678.

Almost surely, 2^3990706 is an apocalyptic number.

3990706 is a deficient number, since it is larger than the sum of its proper divisors (1995356).

3990706 is a wasteful number, since it uses less digits than its factorization.

3990706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995355.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 3990706 is about 1997.6751487667. The cubic root of 3990706 is about 158.6170656419.

The spelling of 3990706 in words is "three million, nine hundred ninety thousand, seven hundred six".