3996445 has 8 divisors (see below), whose sum is σ = 5077944. Its totient is φ = 3009024.

The previous prime is 3996439. The next prime is 3996467. The reversal of 3996445 is 5446993.

It can be written as a sum of positive squares in 4 ways, for example, as 1954404 + 2042041 = 1398^2 + 1429^2 .

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 3996445 - 2⁵ = 3996413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3996398 and 3996407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23424 + ... + 23593.

It is an arithmetic number, because the mean of its divisors is an integer number (634743).

Almost surely, 2^3996445 is an apocalyptic number.

It is an amenable number.

3996445 is a deficient number, since it is larger than the sum of its proper divisors (1081499).

3996445 is a wasteful number, since it uses less digits than its factorization.

3996445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47039.

The product of its digits is 116640, while the sum is 40.

The square root of 3996445 is about 1999.1110524431. Note that the first 3 decimals coincide. The cubic root of 3996445 is about 158.6930645021.

The spelling of 3996445 in words is "three million, nine hundred ninety-six thousand, four hundred forty-five".