3929445 has 32 divisors (see below), whose sum is σ = 7526400. Its totient is φ = 1933632.

The previous prime is 3929417. The next prime is 3929449. The reversal of 3929445 is 5449293.

It is not a de Polignac number, because 3929445 - 2¹⁴ = 3913061 is a prime.

It is a Curzon number.

3929445 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3929449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 636 + ... + 2874.

It is an arithmetic number, because the mean of its divisors is an integer number (235200).

Almost surely, 2^3929445 is an apocalyptic number.

It is an amenable number.

3929445 is a deficient number, since it is larger than the sum of its proper divisors (3596955).

3929445 is a wasteful number, since it uses less digits than its factorization.

3929445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266 (or 2260 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 3929445 is about 1982.2827749844. The cubic root of 3929445 is about 157.8012375389.

The spelling of 3929445 in words is "three million, nine hundred twenty-nine thousand, four hundred forty-five".