3971320 has 32 divisors (see below), whose sum is σ = 9033120. Its totient is φ = 1571200.

The previous prime is 3971311. The next prime is 3971333. The reversal of 3971320 is 231793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3549 + ... + 4531.

It is an arithmetic number, because the mean of its divisors is an integer number (282285).

Almost surely, 2^3971320 is an apocalyptic number.

It is an amenable number.

3971320 is an abundant number, since it is smaller than the sum of its proper divisors (5061800).

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

3971320 is a wasteful number, since it uses less digits than its factorization.

3971320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3971320 is about 1992.8171014923. The cubic root of 3971320 is about 158.3598059768.

The spelling of 3971320 in words is "three million, nine hundred seventy-one thousand, three hundred twenty".