3191920 has 40 divisors (see below), whose sum is σ = 7861104. Its totient is φ = 1201152.

The previous prime is 3191899. The next prime is 3191921. The reversal of 3191920 is 291913.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3191921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187 + ... + 2533.

Almost surely, 2^3191920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3191920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3930552).

3191920 is an abundant number, since it is smaller than the sum of its proper divisors (4669184).

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

3191920 is a wasteful number, since it uses less digits than its factorization.

3191920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377 (or 2371 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 3191920 is about 1786.5945259068. The cubic root of 3191920 is about 147.2371263474.

The spelling of 3191920 in words is "three million, one hundred ninety-one thousand, nine hundred twenty".