40344465 has 32 divisors (see below), whose sum is σ = 74232576. Its totient is φ = 18328320.

The previous prime is 40344443. The next prime is 40344509. The reversal of 40344465 is 56444304.

It is not a de Polignac number, because 40344465 - 2⁵ = 40344433 is a prime.

It is a super-2 number, since 2×40344465² = 3255351712272450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17055 + ... + 19275.

It is an arithmetic number, because the mean of its divisors is an integer number (2319768).

Almost surely, 2^40344465 is an apocalyptic number.

It is an amenable number.

40344465 is a deficient number, since it is larger than the sum of its proper divisors (33888111).

40344465 is a wasteful number, since it uses less digits than its factorization.

40344465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409.

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 40344465 is about 6351.7292920905. The cubic root of 40344465 is about 342.9740961378.

Adding to 40344465 its reverse (56444304), we get a palindrome (96788769).

The spelling of 40344465 in words is "forty million, three hundred forty-four thousand, four hundred sixty-five".