4022686640 has 80 divisors (see below), whose sum is σ = 10731813120. Its totient is φ = 1373664000.

The previous prime is 4022686609. The next prime is 4022686643. The reversal of 4022686640 is 466862204.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 4022686594 and 4022686603.

It is not an unprimeable number, because it can be changed into a prime (4022686643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126251 + ... + 154869.

It is an arithmetic number, because the mean of its divisors is an integer number (134147664).

Almost surely, 2^4022686640 is an apocalyptic number.

4022686640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4022686640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5365906560).

4022686640 is an abundant number, since it is smaller than the sum of its proper divisors (6709126480).

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

4022686640 is a wasteful number, since it uses less digits than its factorization.

4022686640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28890 (or 28884 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 4022686640 is about 63424.6532509244. The cubic root of 4022686640 is about 1590.3964624523.

The spelling of 4022686640 in words is "four billion, twenty-two million, six hundred eighty-six thousand, six hundred forty".