3929897280 has 448 divisors, whose sum is σ = 13698736128. Its totient is φ = 952197120.

The previous prime is 3929897267. The next prime is 3929897287. The reversal of 3929897280 is 827989293.

3929897280 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3929897280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3929897287) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47348119 + ... + 47348201.

It is an arithmetic number, because the mean of its divisors is an integer number (30577536).

Almost surely, 2^3929897280 is an apocalyptic number.

3929897280 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 3929897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6849368064).

3929897280 is an abundant number, since it is smaller than the sum of its proper divisors (9768838848).

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

3929897280 is a wasteful number, since it uses less digits than its factorization.

3929897280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 3929897280 is about 62688.8927960927. The cubic root of 3929897280 is about 1578.0729162590.

The spelling of 3929897280 in words is "three billion, nine hundred twenty-nine million, eight hundred ninety-seven thousand, two hundred eighty".