3971980 has 12 divisors (see below), whose sum is σ = 8341200. Its totient is φ = 1588784.

The previous prime is 3971977. The next prime is 3971983. The reversal of 3971980 is 891793.

It is an interprime number because it is at equal distance from previous prime (3971977) and next prime (3971983).

It is not an unprimeable number, because it can be changed into a prime (3971983) 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, 99280 + ... + 99319.

It is an arithmetic number, because the mean of its divisors is an integer number (695100).

Almost surely, 2^3971980 is an apocalyptic number.

It is an amenable number.

3971980 is an abundant number, since it is smaller than the sum of its proper divisors (4369220).

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

3971980 is a wasteful number, since it uses less digits than its factorization.

3971980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198608 (or 198606 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 3971980 is about 1992.9826893378. The cubic root of 3971980 is about 158.3685781804.

The spelling of 3971980 in words is "three million, nine hundred seventy-one thousand, nine hundred eighty".