4240728845809 has 3 divisors (see below), whose sum is σ = 4240730905113. Its totient is φ = 4240726786506.

The previous prime is 4240728845783. The next prime is 4240728845831. The reversal of 4240728845809 is 9085488270424.

The square root of 4240728845809 is 2059303.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4240728845809 - 2⁷ = 4240728845681 is a prime.

It is a super-2 number, since 2×4240728845809² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4240728845839) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1029652 + ... + 3088954.

It is an arithmetic number, because the mean of its divisors is an integer number (1413576968371).

Almost surely, 2^{4240728845809} is an apocalyptic number.

4240728845809 is the 2059303-rd square number.

4240728845809 is the 1029652-nd centered octagonal number.

It is an amenable number.

4240728845809 is a deficient number, since it is larger than the sum of its proper divisors (2059304).

4240728845809 is an frugal number, since it uses more digits than its factorization.

4240728845809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118606 (or 2059303 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 61.

The spelling of 4240728845809 in words is "four trillion, two hundred forty billion, seven hundred twenty-eight million, eight hundred forty-five thousand, eight hundred nine".