3946215 has 64 divisors (see below), whose sum is σ = 8064000. Its totient is φ = 1636992.

The previous prime is 3946213. The next prime is 3946219. The reversal of 3946215 is 5126493.

It is not a de Polignac number, because 3946215 - 2¹ = 3946213 is a prime.

It is a super-2 number, since 2×3946215² = 31145225652450, which contains 22 as substring.

It is an Ulam number.

3946215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66856 + ... + 66914.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

Almost surely, 2^3946215 is an apocalyptic number.

3946215 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3946215 is an abundant number, since it is smaller than the sum of its proper divisors (4117785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3946215 is a wasteful number, since it uses less digits than its factorization.

3946215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 87 counting only the distinct ones).

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

The square root of 3946215 is about 1986.5082431241. The cubic root of 3946215 is about 158.0254058382.

The spelling of 3946215 in words is "three million, nine hundred forty-six thousand, two hundred fifteen".