4078039644 has 72 divisors (see below), whose sum is σ = 11980725120. Its totient is φ = 1145401632.

The previous prime is 4078039639. The next prime is 4078039687. The reversal of 4078039644 is 4469308704.

It is a self number, because there is not a number n which added to its sum of digits gives 4078039644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122274 + ... + 152009.

It is an arithmetic number, because the mean of its divisors is an integer number (166398960).

Almost surely, 2^4078039644 is an apocalyptic number.

It is an amenable number.

4078039644 is an abundant number, since it is smaller than the sum of its proper divisors (7902685476).

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

4078039644 is a wasteful number, since it uses less digits than its factorization.

4078039644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274359 (or 274354 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 4078039644 is about 63859.5305651396. The cubic root of 4078039644 is about 1597.6579855069.

The spelling of 4078039644 in words is "four billion, seventy-eight million, thirty-nine thousand, six hundred forty-four".