40243434 has 32 divisors (see below), whose sum is σ = 100348416. Its totient is φ = 10452720.

The previous prime is 40243417. The next prime is 40243459. The reversal of 40243434 is 43434204.

It is a happy number.

It is a super-2 number, since 2×40243434² = 3239067960224712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43092 + ... + 44015.

It is an arithmetic number, because the mean of its divisors is an integer number (3135888).

Almost surely, 2^40243434 is an apocalyptic number.

40243434 is an abundant number, since it is smaller than the sum of its proper divisors (60104982).

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

40243434 is a wasteful number, since it uses less digits than its factorization.

40243434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87130.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 40243434 is about 6343.7712758264. The cubic root of 40243434 is about 342.6875638077.

Adding to 40243434 its reverse (43434204), we get a palindrome (83677638).

The spelling of 40243434 in words is "forty million, two hundred forty-three thousand, four hundred thirty-four".