4001205280 has 24 divisors (see below), whose sum is σ = 9452847852. Its totient is φ = 1600482048.

The previous prime is 4001205277. The next prime is 4001205311. The reversal of 4001205280 is 825021004.

4001205280 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 2 ways, for example, as 3880293264 + 120912016 = 62292^2 + 10996^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12503607 + ... + 12503926.

Almost surely, 2^4001205280 is an apocalyptic number.

4001205280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4001205280 is an abundant number, since it is smaller than the sum of its proper divisors (5451642572).

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

4001205280 is a wasteful number, since it uses less digits than its factorization.

4001205280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25007548 (or 25007540 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 4001205280 is about 63255.0810607338. The cubic root of 4001205280 is about 1587.5604745185.

Adding to 4001205280 its reverse (825021004), we get a palindrome (4826226284).

The spelling of 4001205280 in words is "four billion, one million, two hundred five thousand, two hundred eighty".