40142442 has 16 divisors (see below), whose sum is σ = 80432352.
Its totient is φ = 13356240.
The previous prime is 40142419. The next prime is 40142449. The reversal of 40142442 is 24424104.
It is a super-2 number, since 2×401424422 = 3222831299446728, 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, 2433 + ... + 9284.
It is an arithmetic number, because the mean of its divisors is an integer number (5027022).
Almost surely, 240142442 is an apocalyptic number.
40142442 is an abundant number, since it is smaller than the sum of its proper divisors (40289910).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
40142442 is a wasteful number, since it uses less digits than its factorization.
40142442 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12293.
The product of its (nonzero) digits is 1024, while the sum is 21.
The square root of 40142442 is about 6335.8063417374.
The cubic root of 40142442 is about 342.4006624019.
Adding to 40142442 its reverse (24424104), we get a palindrome (64566546).
The spelling of 40142442 in words is "forty million, one hundred forty-two thousand, four hundred forty-two".