3965620 has 12 divisors (see below), whose sum is σ = 8327844. Its totient is φ = 1586240.

The previous prime is 3965617. The next prime is 3965629. The reversal of 3965620 is 265693.

It can be written as a sum of positive squares in 2 ways, for example, as 3055504 + 910116 = 1748^2 + 954^2 .

It is a super-2 number, since 2×3965620² = 31452283968800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965629) 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, 99121 + ... + 99160.

It is an arithmetic number, because the mean of its divisors is an integer number (693987).

Almost surely, 2^3965620 is an apocalyptic number.

It is an amenable number.

3965620 is an abundant number, since it is smaller than the sum of its proper divisors (4362224).

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

3965620 is a wasteful number, since it uses less digits than its factorization.

3965620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198290 (or 198288 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 3965620 is about 1991.3864516964. The cubic root of 3965620 is about 158.2840055634.

The spelling of 3965620 in words is "three million, nine hundred sixty-five thousand, six hundred twenty".