3945860 has 12 divisors (see below), whose sum is σ = 8286348. Its totient is φ = 1578336.

The previous prime is 3945841. The next prime is 3945883. The reversal of 3945860 is 685493.

It can be written as a sum of positive squares in 2 ways, for example, as 1236544 + 2709316 = 1112^2 + 1646^2 .

It is a super-2 number, since 2×3945860² = 31139622279200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3945860.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98627 + ... + 98666.

It is an arithmetic number, because the mean of its divisors is an integer number (690529).

Almost surely, 2^3945860 is an apocalyptic number.

It is an amenable number.

3945860 is an abundant number, since it is smaller than the sum of its proper divisors (4340488).

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

3945860 is a wasteful number, since it uses less digits than its factorization.

3945860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197302 (or 197300 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3945860 is about 1986.4188883516. The cubic root of 3945860 is about 158.0206670610.

The spelling of 3945860 in words is "three million, nine hundred forty-five thousand, eight hundred sixty".