40142869 has 8 divisors (see below), whose sum is σ = 43636320. Its totient is φ = 36707376.

The previous prime is 40142863. The next prime is 40142929. The reversal of 40142869 is 96824104.

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 40142869 - 2⁹ = 40142357 is a prime.

It is a super-2 number, since 2×40142869² = 3222899863102322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13039 + ... + 15820.

It is an arithmetic number, because the mean of its divisors is an integer number (5454540).

Almost surely, 2^40142869 is an apocalyptic number.

It is an amenable number.

40142869 is a deficient number, since it is larger than the sum of its proper divisors (3493451).

40142869 is a wasteful number, since it uses less digits than its factorization.

40142869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28979.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 40142869 is about 6335.8400390161. The cubic root of 40142869 is about 342.4018764500.

The spelling of 40142869 in words is "forty million, one hundred forty-two thousand, eight hundred sixty-nine".