3820565640 has 64 divisors (see below), whose sum is σ = 11498428800. Its totient is φ = 1015552512.

The previous prime is 3820565629. The next prime is 3820565653. The reversal of 3820565640 is 465650283.

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, 13300 + ... + 88419.

It is an arithmetic number, because the mean of its divisors is an integer number (179662950).

Almost surely, 2^3820565640 is an apocalyptic number.

3820565640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3820565640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5749214400).

3820565640 is an abundant number, since it is smaller than the sum of its proper divisors (7677863160).

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

3820565640 is a wasteful number, since it uses less digits than its factorization.

3820565640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102046 (or 102042 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 3820565640 is about 61810.7243122098. The cubic root of 3820565640 is about 1563.3008182063.

The spelling of 3820565640 in words is "three billion, eight hundred twenty million, five hundred sixty-five thousand, six hundred forty".