3947980 has 24 divisors (see below), whose sum is σ = 8371440. Its totient is φ = 1563840.

The previous prime is 3947971. The next prime is 3947987. The reversal of 3947980 is 897493.

It is not an unprimeable number, because it can be changed into a prime (3947987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275 + ... + 3085.

It is an arithmetic number, because the mean of its divisors is an integer number (348810).

Almost surely, 2^3947980 is an apocalyptic number.

It is an amenable number.

3947980 is an abundant number, since it is smaller than the sum of its proper divisors (4423460).

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

3947980 is a wasteful number, since it uses less digits than its factorization.

3947980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 3947980 is about 1986.9524402964. The cubic root of 3947980 is about 158.0489620196.

The spelling of 3947980 in words is "three million, nine hundred forty-seven thousand, nine hundred eighty".