3930213 has 32 divisors (see below), whose sum is σ = 6462720. Its totient is φ = 2073600.

The previous prime is 3930209. The next prime is 3930221. The reversal of 3930213 is 3120393.

It is not a de Polignac number, because 3930213 - 2² = 3930209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

3930213 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3930213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3930293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36003 + ... + 36111.

It is an arithmetic number, because the mean of its divisors is an integer number (201960).

Almost surely, 2^3930213 is an apocalyptic number.

It is an amenable number.

3930213 is a deficient number, since it is larger than the sum of its proper divisors (2532507).

3930213 is a wasteful number, since it uses less digits than its factorization.

3930213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 3930213 is about 1982.4764815755. The cubic root of 3930213 is about 157.8115174856.

The spelling of 3930213 in words is "three million, nine hundred thirty thousand, two hundred thirteen".