40440266 has 4 divisors (see below), whose sum is σ = 60660402. Its totient is φ = 20220132.

The previous prime is 40440259. The next prime is 40440269. The reversal of 40440266 is 66204404.

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., 39753025 + 687241 = 6305^2 + 829^2 .

It is a super-2 number, since 2×40440266² = 3270830228301512, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40440269) by changing a digit.

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, 10110065 + ... + 10110068.

Almost surely, 2^40440266 is an apocalyptic number.

40440266 is a deficient number, since it is larger than the sum of its proper divisors (20220136).

40440266 is a wasteful number, since it uses less digits than its factorization.

40440266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20220135.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 40440266 is about 6359.2661526311. The cubic root of 40440266 is about 343.2453542338.

The spelling of 40440266 in words is "forty million, four hundred forty thousand, two hundred sixty-six".