3920445 has 12 divisors (see below), whose sum is σ = 6795516. Its totient is φ = 2090880.

The previous prime is 3920431. The next prime is 3920453. The reversal of 3920445 is 5440293.

It can be written as a sum of positive squares in 2 ways, for example, as 2414916 + 1505529 = 1554^2 + 1227^2 .

It is not a de Polignac number, because 3920445 - 2⁴ = 3920429 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43516 + ... + 43605.

It is an arithmetic number, because the mean of its divisors is an integer number (566293).

Almost surely, 2^3920445 is an apocalyptic number.

It is an amenable number.

3920445 is a deficient number, since it is larger than the sum of its proper divisors (2875071).

3920445 is a wasteful number, since it uses less digits than its factorization.

3920445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87132 (or 87129 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 3920445 is about 1980.0113636038. The cubic root of 3920445 is about 157.6806694686.

The spelling of 3920445 in words is "three million, nine hundred twenty thousand, four hundred forty-five".