40442040 has 48 divisors (see below), whose sum is σ = 131437800. Its totient is φ = 10784448.

The previous prime is 40442009. The next prime is 40442057. The reversal of 40442040 is 4024404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 3.

It is a congruent 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 in 11 ways as a sum of consecutive naturals, for example, 55810 + ... + 56529.

Almost surely, 2^40442040 is an apocalyptic number.

40442040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40442040 is an abundant number, since it is smaller than the sum of its proper divisors (90995760).

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

40442040 is a wasteful number, since it uses less digits than its factorization.

40442040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112356 (or 112349 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 40442040 is about 6359.4056326044. The cubic root of 40442040 is about 343.2503732278.

Adding to 40442040 its reverse (4024404), we get a palindrome (44466444).

It can be divided in two parts, 4044 and 2040, that added together give a square (6084 = 78²).

The spelling of 40442040 in words is "forty million, four hundred forty-two thousand, forty".