240434431 has 4 divisors (see below), whose sum is σ = 242026864. Its totient is φ = 238842000.

The previous prime is 240434423. The next prime is 240434437. The reversal of 240434431 is 134434042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240434431 - 2³ = 240434423 is a prime.

It is a super-2 number, since 2×240434431² = 115617431220587522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240434396 and 240434405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240434437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795990 + ... + 796291.

It is an arithmetic number, because the mean of its divisors is an integer number (60506716).

Almost surely, 2^240434431 is an apocalyptic number.

240434431 is a deficient number, since it is larger than the sum of its proper divisors (1592433).

240434431 is a wasteful number, since it uses less digits than its factorization.

240434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592432.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 240434431 is about 15505.9482457540. The cubic root of 240434431 is about 621.8212413181.

Adding to 240434431 its reverse (134434042), we get a palindrome (374868473).

The spelling of 240434431 in words is "two hundred forty million, four hundred thirty-four thousand, four hundred thirty-one".