40440142 has 8 divisors (see below), whose sum is σ = 60687216. Its totient is φ = 20211072.

The previous prime is 40440131. The next prime is 40440157. The reversal of 40440142 is 24104404.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 6318 + ... + 10990.

It is an arithmetic number, because the mean of its divisors is an integer number (7585902).

Almost surely, 2^40440142 is an apocalyptic number.

40440142 is a deficient number, since it is larger than the sum of its proper divisors (20247074).

40440142 is a wasteful number, since it uses less digits than its factorization.

40440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9002.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 40440142 is about 6359.2564030710. The cubic root of 40440142 is about 343.2450034080.

Adding to 40440142 its reverse (24104404), we get a palindrome (64544546).

The spelling of 40440142 in words is "forty million, four hundred forty thousand, one hundred forty-two".