4005522780 has 96 divisors (see below), whose sum is σ = 12980029440. Its totient is φ = 903951360.

The previous prime is 4005522769. The next prime is 4005522823. The reversal of 4005522780 is 872255004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27181 + ... + 93540.

It is an arithmetic number, because the mean of its divisors is an integer number (135208640).

Almost surely, 2^4005522780 is an apocalyptic number.

It is an amenable number.

4005522780 is an abundant number, since it is smaller than the sum of its proper divisors (8974506660).

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

4005522780 is a wasteful number, since it uses less digits than its factorization.

4005522780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120819 (or 120817 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 4005522780 is about 63289.1995525303. The cubic root of 4005522780 is about 1588.1312882252.

Adding to 4005522780 its reverse (872255004), we get a palindrome (4877777784).

It can be divided in two parts, 40055 and 22780, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 4005522780 in words is "four billion, five million, five hundred twenty-two thousand, seven hundred eighty".