3291640704 has 192 divisors, whose sum is σ = 10374464880. Its totient is φ = 993484800.

The previous prime is 3291640697. The next prime is 3291640717. The reversal of 3291640704 is 4070461923.

3291640704 is a `hidden beast` number, since 3 + 2 + 9 + 1 + 640 + 7 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5334604 + ... + 5335220.

Almost surely, 2^3291640704 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 3291640704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5187232440).

3291640704 is an abundant number, since it is smaller than the sum of its proper divisors (7082824176).

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

3291640704 is a wasteful number, since it uses less digits than its factorization.

3291640704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 3291640704 is about 57372.8219978763. The cubic root of 3291640704 is about 1487.5473822818.

The spelling of 3291640704 in words is "three billion, two hundred ninety-one million, six hundred forty thousand, seven hundred four".