3928385 has 8 divisors (see below), whose sum is σ = 4746600. Its totient is φ = 3121024.

The previous prime is 3928381. The next prime is 3928391. The reversal of 3928385 is 5838293.

It can be written as a sum of positive squares in 4 ways, for example, as 39601 + 3888784 = 199^2 + 1972^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3928385 - 2² = 3928381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1892 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (593325).

Almost surely, 2^3928385 is an apocalyptic number.

It is an amenable number.

3928385 is a deficient number, since it is larger than the sum of its proper divisors (818215).

3928385 is a wasteful number, since it uses less digits than its factorization.

3928385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427.

The product of its digits is 51840, while the sum is 38.

The square root of 3928385 is about 1982.0153884367. The cubic root of 3928385 is about 157.7870468704.

The spelling of 3928385 in words is "three million, nine hundred twenty-eight thousand, three hundred eighty-five".