40142444 has 24 divisors (see below), whose sum is σ = 72483936. Its totient is φ = 19440000.

The previous prime is 40142419. The next prime is 40142449. The reversal of 40142444 is 44424104.

It is a super-2 number, since 2×40142444² = 3222831620586272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40142449) 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 in 7 ways as a sum of consecutive naturals, for example, 23954 + ... + 25574.

It is an arithmetic number, because the mean of its divisors is an integer number (3020164).

Almost surely, 2^40142444 is an apocalyptic number.

It is an amenable number.

40142444 is a deficient number, since it is larger than the sum of its proper divisors (32341492).

40142444 is a wasteful number, since it uses less digits than its factorization.

40142444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 40142444 is about 6335.8064995705. The cubic root of 40142444 is about 342.4006680883.

Adding to 40142444 its reverse (44424104), we get a palindrome (84566548).

The spelling of 40142444 in words is "forty million, one hundred forty-two thousand, four hundred forty-four".