3928445 has 16 divisors (see below), whose sum is σ = 5047920. Its totient is φ = 2924544.

The previous prime is 3928429. The next prime is 3928447. The reversal of 3928445 is 5448293.

It can be written as a sum of positive squares in 8 ways, for example, as 121 + 3928324 = 11^2 + 1982^2 .

It is not a de Polignac number, because 3928445 - 2⁴ = 3928429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928447) 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, 9401 + ... + 9809.

It is an arithmetic number, because the mean of its divisors is an integer number (315495).

Almost surely, 2^3928445 is an apocalyptic number.

It is an amenable number.

3928445 is a deficient number, since it is larger than the sum of its proper divisors (1119475).

3928445 is a wasteful number, since it uses less digits than its factorization.

3928445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544.

The product of its digits is 34560, while the sum is 35.

The square root of 3928445 is about 1982.0305244875. The cubic root of 3928445 is about 157.7878501839.

The spelling of 3928445 in words is "three million, nine hundred twenty-eight thousand, four hundred forty-five".