40440434 has 4 divisors (see below), whose sum is σ = 60660654. Its totient is φ = 20220216.

The previous prime is 40440419. The next prime is 40440451. The reversal of 40440434 is 43404404.

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

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 156025 = 6347^2 + 395^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 10110107 + ... + 10110110.

Almost surely, 2^40440434 is an apocalyptic number.

40440434 is a deficient number, since it is larger than the sum of its proper divisors (20220220).

40440434 is a wasteful number, since it uses less digits than its factorization.

40440434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20220219.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 40440434 is about 6359.2793616887. The cubic root of 40440434 is about 343.2458295451.

Adding to 40440434 its reverse (43404404), we get a palindrome (83844838).

The spelling of 40440434 in words is "forty million, four hundred forty thousand, four hundred thirty-four".