3929139240 has 128 divisors (see below), whose sum is σ = 13132022400. Its totient is φ = 933811200.

The previous prime is 3929139217. The next prime is 3929139281. The reversal of 3929139240 is 429319293.

It is a junction number, because it is equal to n+sod(n) for n = 3929139192 and 3929139201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1815 + ... + 88665.

It is an arithmetic number, because the mean of its divisors is an integer number (102593925).

Almost surely, 2^3929139240 is an apocalyptic number.

3929139240 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 3929139240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6566011200).

3929139240 is an abundant number, since it is smaller than the sum of its proper divisors (9202883160).

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

3929139240 is a wasteful number, since it uses less digits than its factorization.

3929139240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86907 (or 86903 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 3929139240 is about 62682.8464573842. The cubic root of 3929139240 is about 1577.9714446233.

The spelling of 3929139240 in words is "three billion, nine hundred twenty-nine million, one hundred thirty-nine thousand, two hundred forty".