3197840 has 40 divisors (see below), whose sum is σ = 7553088. Its totient is φ = 1258880.

The previous prime is 3197839. The next prime is 3197849. The reversal of 3197840 is 487913.

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

It is a junction number, because it is equal to n+sod(n) for n = 3197797 and 3197806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3197849) 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, 5399 + ... + 5961.

Almost surely, 2^3197840 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 3197840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3776544).

3197840 is an abundant number, since it is smaller than the sum of its proper divisors (4355248).

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

3197840 is a wasteful number, since it uses less digits than its factorization.

3197840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 3197840 is about 1788.2505417307. The cubic root of 3197840 is about 147.3280961992.

The spelling of 3197840 in words is "three million, one hundred ninety-seven thousand, eight hundred forty".