3869804646 has 64 divisors (see below), whose sum is σ = 8870523840. Its totient is φ = 1265520672.

The previous prime is 3869804641. The next prime is 3869804647. The reversal of 3869804646 is 6464089683.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 3869804592 and 3869804601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869804641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223476 + ... + 240168.

It is an arithmetic number, because the mean of its divisors is an integer number (138601935).

Almost surely, 2^3869804646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3869804646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4435261920).

3869804646 is an abundant number, since it is smaller than the sum of its proper divisors (5000719194).

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

3869804646 is an equidigital number, since it uses as much as digits as its factorization.

3869804646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16769 (or 16751 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The square root of 3869804646 is about 62207.7539057632. The cubic root of 3869804646 is about 1569.9880516218.

The spelling of 3869804646 in words is "three billion, eight hundred sixty-nine million, eight hundred four thousand, six hundred forty-six".