3920506 has 8 divisors (see below), whose sum is σ = 6226740. Its totient is φ = 1844928.

The previous prime is 3920471. The next prime is 3920509. The reversal of 3920506 is 6050293.

3920506 = 24² + 25² + ... + 227².

It can be written as a sum of positive squares in 2 ways, for example, as 3900625 + 19881 = 1975^2 + 141^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3920509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57621 + ... + 57688.

Almost surely, 2^3920506 is an apocalyptic number.

3920506 is a deficient number, since it is larger than the sum of its proper divisors (2306234).

3920506 is a wasteful number, since it uses less digits than its factorization.

3920506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115328.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 3920506 is about 1980.0267674958. The cubic root of 3920506 is about 157.6814872729.

Adding to 3920506 its reverse (6050293), we get a palindrome (9970799).

The spelling of 3920506 in words is "three million, nine hundred twenty thousand, five hundred six".