3920945 has 16 divisors (see below), whose sum is σ = 5564160. Its totient is φ = 2595264.

The previous prime is 3920941. The next prime is 3920947. The reversal of 3920945 is 5490293.

It is not a de Polignac number, because 3920945 - 2² = 3920941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917 + ... + 2946.

It is an arithmetic number, because the mean of its divisors is an integer number (347760).

Almost surely, 2^3920945 is an apocalyptic number.

3920945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3920945 is a deficient number, since it is larger than the sum of its proper divisors (1643215).

3920945 is a wasteful number, since it uses less digits than its factorization.

3920945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 3920945 is about 1980.1376214799. The cubic root of 3920945 is about 157.6873725327.

The spelling of 3920945 in words is "three million, nine hundred twenty thousand, nine hundred forty-five".