240343009 has 9 divisors (see below), whose sum is σ = 247605267. Its totient is φ = 233289144.

The previous prime is 240343001. The next prime is 240343013. The reversal of 240343009 is 900343042.

The square root of 240343009 is 15503.

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

It can be written as a sum of positive squares in only one way, i.e., 215062225 + 25280784 = 14665^2 + 5028^2 .

It is not a de Polignac number, because 240343009 - 2³ = 240343001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240343001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 573402 + ... + 573820.

Almost surely, 2^240343009 is an apocalyptic number.

240343009 is the 15503-rd square number.

240343009 is the 7752-nd centered octagonal number.

It is an amenable number.

240343009 is a deficient number, since it is larger than the sum of its proper divisors (7262258).

240343009 is an frugal number, since it uses more digits than its factorization.

240343009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The cubic root of 240343009 is about 621.7424182365.

Multiplying 240343009 by its sum of digits (25), we get a square (6008575225 = 77515²).

The spelling of 240343009 in words is "two hundred forty million, three hundred forty-three thousand, nine".