3971632 has 20 divisors (see below), whose sum is σ = 8794576. Its totient is φ = 1702080.

The previous prime is 3971621. The next prime is 3971651. The reversal of 3971632 is 2361793.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3971594 and 3971603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17619 + ... + 17842.

Almost surely, 2^3971632 is an apocalyptic number.

It is an amenable number.

3971632 is an abundant number, since it is smaller than the sum of its proper divisors (4822944).

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

3971632 is a wasteful number, since it uses less digits than its factorization.

3971632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35476 (or 35470 counting only the distinct ones).

The product of its digits is 6804, while the sum is 31.

The square root of 3971632 is about 1992.8953810976. The cubic root of 3971632 is about 158.3639529578.

The spelling of 3971632 in words is "three million, nine hundred seventy-one thousand, six hundred thirty-two".