3920385 has 16 divisors (see below), whose sum is σ = 7168896. Its totient is φ = 1792128.

The previous prime is 3920383. The next prime is 3920401. The reversal of 3920385 is 5830293.

It is a happy number.

It is not a de Polignac number, because 3920385 - 2¹ = 3920383 is a prime.

It is a Curzon number.

3920385 is a lucky number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (3920383) 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, 18564 + ... + 18773.

It is an arithmetic number, because the mean of its divisors is an integer number (448056).

Almost surely, 2^3920385 is an apocalyptic number.

3920385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3920385 is a deficient number, since it is larger than the sum of its proper divisors (3248511).

3920385 is a wasteful number, since it uses less digits than its factorization.

3920385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37352.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 3920385 is about 1979.9962121176. The cubic root of 3920385 is about 157.6798650626.

The spelling of 3920385 in words is "three million, nine hundred twenty thousand, three hundred eighty-five".