40142239 has 8 divisors (see below), whose sum is σ = 41403600. Its totient is φ = 38894400.

The previous prime is 40142213. The next prime is 40142251. The reversal of 40142239 is 93224104.

40142239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40142239 - 2⁹ = 40141727 is a prime.

It is a super-3 number, since 3×40142239³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2824 + ... + 9394.

It is an arithmetic number, because the mean of its divisors is an integer number (5175450).

Almost surely, 2^40142239 is an apocalyptic number.

40142239 is a deficient number, since it is larger than the sum of its proper divisors (1261361).

40142239 is a wasteful number, since it uses less digits than its factorization.

40142239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6761.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40142239 is about 6335.7903216568. The cubic root of 40142239 is about 342.4000852285.

The spelling of 40142239 in words is "forty million, one hundred forty-two thousand, two hundred thirty-nine".