4539491280 has 120 divisors (see below), whose sum is σ = 15416636040. Its totient is φ = 1196912640.

The previous prime is 4539491279. The next prime is 4539491303. The reversal of 4539491280 is 821949354.

4539491280 is a `hidden beast` number, since 4 + 539 + 4 + 91 + 28 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 97535376 + 4441955904 = 9876^2 + 66648^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28660 + ... + 99500.

It is an arithmetic number, because the mean of its divisors is an integer number (128471967).

Almost surely, 2^4539491280 is an apocalyptic number.

4539491280 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 4539491280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7708318020).

4539491280 is an abundant number, since it is smaller than the sum of its proper divisors (10877144760).

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

4539491280 is a wasteful number, since it uses less digits than its factorization.

4539491280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70949 (or 70940 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 4539491280 is about 67375.7469717405. The cubic root of 4539491280 is about 1655.7790960674.

The spelling of 4539491280 in words is "four billion, five hundred thirty-nine million, four hundred ninety-one thousand, two hundred eighty".