3969807872 has 40 divisors (see below), whose sum is σ = 8008976976. Its totient is φ = 1965606912.

The previous prime is 3969807869. The next prime is 3969807893. The reversal of 3969807872 is 2787089693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15098 + ... + 90374.

Almost surely, 2^3969807872 is an apocalyptic number.

3969807872 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 3969807872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4004488488).

3969807872 is an abundant number, since it is smaller than the sum of its proper divisors (4039169104).

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

3969807872 is an equidigital number, since it uses as much as digits as its factorization.

3969807872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75398 (or 75382 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 59.

The square root of 3969807872 is about 63006.4113563056. The cubic root of 3969807872 is about 1583.3970428978.

The spelling of 3969807872 in words is "three billion, nine hundred sixty-nine million, eight hundred seven thousand, eight hundred seventy-two".