3945980 has 12 divisors (see below), whose sum is σ = 8286600. Its totient is φ = 1578384.

The previous prime is 3945973. The next prime is 3945983. The reversal of 3945980 is 895493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945983) 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, 98630 + ... + 98669.

It is an arithmetic number, because the mean of its divisors is an integer number (690550).

Almost surely, 2^3945980 is an apocalyptic number.

It is an amenable number.

3945980 is an abundant number, since it is smaller than the sum of its proper divisors (4340620).

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

3945980 is a wasteful number, since it uses less digits than its factorization.

3945980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197308 (or 197306 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 3945980 is about 1986.4490932314. The cubic root of 3945980 is about 158.0222689330.

The spelling of 3945980 in words is "three million, nine hundred forty-five thousand, nine hundred eighty".