3955220 has 24 divisors (see below), whose sum is σ = 8795304. Its totient is φ = 1488896.

The previous prime is 3955187. The next prime is 3955243. The reversal of 3955220 is 225593.

It can be written as a sum of positive squares in 4 ways, for example, as 1119364 + 2835856 = 1058^2 + 1684^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3955220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5477 + ... + 6156.

It is an arithmetic number, because the mean of its divisors is an integer number (366471).

Almost surely, 2^3955220 is an apocalyptic number.

It is an amenable number.

3955220 is an abundant number, since it is smaller than the sum of its proper divisors (4840084).

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

3955220 is a wasteful number, since it uses less digits than its factorization.

3955220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11659 (or 11657 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3955220 is about 1988.7734913760. The cubic root of 3955220 is about 158.1455156767.

The spelling of 3955220 in words is "three million, nine hundred fifty-five thousand, two hundred twenty".