3196505840 has 80 divisors (see below), whose sum is σ = 8116087680. Its totient is φ = 1161135360.

The previous prime is 3196505803. The next prime is 3196505857. The reversal of 3196505840 is 485056913.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465871 + ... + 1468049.

It is an arithmetic number, because the mean of its divisors is an integer number (101451096).

Almost surely, 2^3196505840 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 3196505840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4058043840).

3196505840 is an abundant number, since it is smaller than the sum of its proper divisors (4919581840).

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

3196505840 is a wasteful number, since it uses less digits than its factorization.

3196505840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870 (or 3864 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 3196505840 is about 56537.6497566002. The cubic root of 3196505840 is about 1473.0760459708.

The spelling of 3196505840 in words is "three billion, one hundred ninety-six million, five hundred five thousand, eight hundred forty".