3996649 has 8 divisors (see below), whose sum is σ = 4254120. Its totient is φ = 3741696.

The previous prime is 3996647. The next prime is 3996653. The reversal of 3996649 is 9466993.

It can be written as a sum of positive squares in 4 ways, for example, as 310249 + 3686400 = 557^2 + 1920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3996649 - 2¹ = 3996647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3996599 and 3996608.

It is not an unprimeable number, because it can be changed into a prime (3996647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3457 + ... + 4465.

It is an arithmetic number, because the mean of its divisors is an integer number (531765).

Almost surely, 2^3996649 is an apocalyptic number.

It is an amenable number.

3996649 is a deficient number, since it is larger than the sum of its proper divisors (257471).

3996649 is a wasteful number, since it uses less digits than its factorization.

3996649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259.

The product of its digits is 314928, while the sum is 46.

The square root of 3996649 is about 1999.1620744702. The cubic root of 3996649 is about 158.6957646380.

The spelling of 3996649 in words is "three million, nine hundred ninety-six thousand, six hundred forty-nine".