4042221078 has 64 divisors (see below), whose sum is σ = 9484392960. Its totient is φ = 1124409600.

The previous prime is 4042221077. The next prime is 4042221109. The reversal of 4042221078 is 8701222404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042221077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 929433 + ... + 933771.

It is an arithmetic number, because the mean of its divisors is an integer number (148193640).

Almost surely, 2^4042221078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4042221078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4742196480).

4042221078 is an abundant number, since it is smaller than the sum of its proper divisors (5442171882).

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

4042221078 is a wasteful number, since it uses less digits than its factorization.

4042221078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 4042221078 is about 63578.4639481012. The cubic root of 4042221078 is about 1592.9666641170.

The spelling of 4042221078 in words is "four billion, forty-two million, two hundred twenty-one thousand, seventy-eight".