3994445 has 16 divisors (see below), whose sum is σ = 5900160. Its totient is φ = 2528064.

The previous prime is 3994429. The next prime is 3994453. The reversal of 3994445 is 5444993.

It is not a de Polignac number, because 3994445 - 2⁴ = 3994429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3994399 and 3994408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3935 + ... + 4844.

It is an arithmetic number, because the mean of its divisors is an integer number (368760).

Almost surely, 2^3994445 is an apocalyptic number.

3994445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3994445 is a deficient number, since it is larger than the sum of its proper divisors (1905715).

3994445 is a wasteful number, since it uses less digits than its factorization.

3994445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8804.

The product of its digits is 77760, while the sum is 38.

The square root of 3994445 is about 1998.6107675083. The cubic root of 3994445 is about 158.6665877135. Note that the first 3 decimals are identical.

The spelling of 3994445 in words is "three million, nine hundred ninety-four thousand, four hundred forty-five".