3979185644 has 12 divisors (see below), whose sum is σ = 7958371344. Its totient is φ = 1705365264.

The previous prime is 3979185619. The next prime is 3979185649. The reversal of 3979185644 is 4465819793.

3979185644 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 3979185644.

It is not an unprimeable number, because it can be changed into a prime (3979185649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 71056859 + ... + 71056914.

It is an arithmetic number, because the mean of its divisors is an integer number (663197612).

Almost surely, 2^3979185644 is an apocalyptic number.

It is an amenable number.

3979185644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3979185644 is a wasteful number, since it uses less digits than its factorization.

3979185644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142113784 (or 142113782 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The square root of 3979185644 is about 63080.7866469657. The cubic root of 3979185644 is about 1584.6428680522.

The spelling of 3979185644 in words is "three billion, nine hundred seventy-nine million, one hundred eighty-five thousand, six hundred forty-four".