3979569342 has 128 divisors (see below), whose sum is σ = 10182205440. Its totient is φ = 1010655360.

The previous prime is 3979569337. The next prime is 3979569353. The reversal of 3979569342 is 2439659793.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 970717 + ... + 974807.

It is an arithmetic number, because the mean of its divisors is an integer number (79548480).

Almost surely, 2^3979569342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3979569342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5091102720).

3979569342 is an abundant number, since it is smaller than the sum of its proper divisors (6202636098).

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

3979569342 is a wasteful number, since it uses less digits than its factorization.

3979569342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198.

The product of its digits is 11022480, while the sum is 57.

The square root of 3979569342 is about 63083.8278959037. The cubic root of 3979569342 is about 1584.6938001450.

The spelling of 3979569342 in words is "three billion, nine hundred seventy-nine million, five hundred sixty-nine thousand, three hundred forty-two".