4539947840 has 28 divisors (see below), whose sum is σ = 10810751556. Its totient is φ = 1815979008.

The previous prime is 4539947831. The next prime is 4539947857. The reversal of 4539947840 is 487499354.

It can be written as a sum of positive squares in 2 ways, for example, as 2151475456 + 2388472384 = 46384^2 + 48872^2 .

It is a super-2 number, since 2×4539947840² = 41222252779841331200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7093349 + ... + 7093988.

Almost surely, 2^4539947840 is an apocalyptic number.

4539947840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4539947840 is an abundant number, since it is smaller than the sum of its proper divisors (6270803716).

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

4539947840 is a wasteful number, since it uses less digits than its factorization.

4539947840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14187354 (or 14187344 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The square root of 4539947840 is about 67379.1350493608. The cubic root of 4539947840 is about 1655.8346042816.

It can be divided in two parts, 45399 and 47840, that added together give a palindrome (93239).

The spelling of 4539947840 in words is "four billion, five hundred thirty-nine million, nine hundred forty-seven thousand, eight hundred forty".