3969630720 has 640 divisors, whose sum is σ = 16121825280. Its totient is φ = 916439040.

The previous prime is 3969630703. The next prime is 3969630757. The reversal of 3969630720 is 270369693.

3969630720 is a `hidden beast` number, since 3 + 9 + 6 + 9 + 630 + 7 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17487247 + ... + 17487473.

It is an arithmetic number, because the mean of its divisors is an integer number (25190352).

Almost surely, 2^3969630720 is an apocalyptic number.

3969630720 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 3969630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8060912640).

3969630720 is an abundant number, since it is smaller than the sum of its proper divisors (12152194560).

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

3969630720 is a wasteful number, since it uses less digits than its factorization.

3969630720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 45.

The square root of 3969630720 is about 63005.0055154350. The cubic root of 3969630720 is about 1583.3734896064.

The spelling of 3969630720 in words is "three billion, nine hundred sixty-nine million, six hundred thirty thousand, seven hundred twenty".