4078821672 has 24 divisors (see below), whose sum is σ = 11046808890. Its totient is φ = 1359607200.

The previous prime is 4078821653. The next prime is 4078821701. The reversal of 4078821672 is 2761288704.

4078821672 is a `hidden beast` number, since 407 + 8 + 82 + 167 + 2 = 666.

4078821672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4053359556 + 25462116 = 63666^2 + 5046^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28325079 + ... + 28325222.

Almost surely, 2^4078821672 is an apocalyptic number.

It is an amenable number.

4078821672 is an abundant number, since it is smaller than the sum of its proper divisors (6967987218).

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

4078821672 is a wasteful number, since it uses less digits than its factorization.

4078821672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56650313 (or 56650306 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 4078821672 is about 63865.6533044171. The cubic root of 4078821672 is about 1597.7601042970.

The spelling of 4078821672 in words is "four billion, seventy-eight million, eight hundred twenty-one thousand, six hundred seventy-two".