3969343872 has 256 divisors, whose sum is σ = 13360939200. Its totient is φ = 1149272064.

The previous prime is 3969343867. The next prime is 3969343879. The reversal of 3969343872 is 2783439693.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969343879) 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, 761178 + ... + 766374.

Almost surely, 2^3969343872 is an apocalyptic number.

3969343872 is a gapful number since it is divisible by the number (32) 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 3969343872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6680469600).

3969343872 is an abundant number, since it is smaller than the sum of its proper divisors (9391595328).

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

3969343872 is a wasteful number, since it uses less digits than its factorization.

3969343872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250 (or 5232 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 54.

The square root of 3969343872 is about 63002.7290837468. The cubic root of 3969343872 is about 1583.3353501679.

The spelling of 3969343872 in words is "three billion, nine hundred sixty-nine million, three hundred forty-three thousand, eight hundred seventy-two".