3991360 has 28 divisors (see below), whose sum is σ = 9505188. Its totient is φ = 1596416.

The previous prime is 3991333. The next prime is 3991369. The reversal of 3991360 is 631993.

3991360 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 2 ways, for example, as 2119936 + 1871424 = 1456^2 + 1368^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991369) 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 3 ways as a sum of consecutive naturals, for example, 5917 + ... + 6556.

It is an arithmetic number, because the mean of its divisors is an integer number (339471).

Almost surely, 2^3991360 is an apocalyptic number.

It is an amenable number.

3991360 is an abundant number, since it is smaller than the sum of its proper divisors (5513828).

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

3991360 is a wasteful number, since it uses less digits than its factorization.

3991360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12490 (or 12480 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 3991360 is about 1997.8388323386. The cubic root of 3991360 is about 158.6257299313.

The spelling of 3991360 in words is "three million, nine hundred ninety-one thousand, three hundred sixty".