3967720 has 32 divisors (see below), whose sum is σ = 8984520. Its totient is φ = 1576960.

The previous prime is 3967699. The next prime is 3967727. The reversal of 3967720 is 277693.

3967720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3305124 + 662596 = 1818^2 + 814^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3967727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11064 + ... + 11416.

Almost surely, 2^3967720 is an apocalyptic number.

It is an amenable number.

3967720 is an abundant number, since it is smaller than the sum of its proper divisors (5016800).

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

3967720 is a wasteful number, since it uses less digits than its factorization.

3967720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 3967720 is about 1991.9136527470. The cubic root of 3967720 is about 158.3119404769.

The spelling of 3967720 in words is "three million, nine hundred sixty-seven thousand, seven hundred twenty".