3956220 has 72 divisors (see below), whose sum is σ = 12405120. Its totient is φ = 1019520.

The previous prime is 3956219. The next prime is 3956221. The reversal of 3956220 is 226593.

3956220 is a `hidden beast` number, since 39 + 5 + 622 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (3956219) and next prime (3956221).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3956221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5226 + ... + 5934.

Almost surely, 2^3956220 is an apocalyptic number.

3956220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3956220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6202560).

3956220 is an abundant number, since it is smaller than the sum of its proper divisors (8448900).

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

3956220 is a wasteful number, since it uses less digits than its factorization.

3956220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 3956220 is about 1989.0248867221. The cubic root of 3956220 is about 158.1588425535.

The spelling of 3956220 in words is "three million, nine hundred fifty-six thousand, two hundred twenty".