3971650 has 12 divisors (see below), whose sum is σ = 7387362. Its totient is φ = 1588640.

The previous prime is 3971621. The next prime is 3971651. The reversal of 3971650 is 561793.

It can be written as a sum of positive squares in 3 ways, for example, as 3560769 + 410881 = 1887^2 + 641^2 .

It is not an unprimeable number, because it can be changed into a prime (3971651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39667 + ... + 39766.

Almost surely, 2^3971650 is an apocalyptic number.

3971650 is a deficient number, since it is larger than the sum of its proper divisors (3415712).

3971650 is a wasteful number, since it uses less digits than its factorization.

3971650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79445 (or 79440 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 3971650 is about 1992.8998971348. The cubic root of 3971650 is about 158.3641922001.

The spelling of 3971650 in words is "three million, nine hundred seventy-one thousand, six hundred fifty".