40857887 has 8 divisors (see below), whose sum is σ = 47124000. Its totient is φ = 34699104.

The previous prime is 40857871. The next prime is 40857889. The reversal of 40857887 is 78875804.

It is a happy number.

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 40857887 - 2⁴ = 40857871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40857889) 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, 26012 + ... + 27537.

It is an arithmetic number, because the mean of its divisors is an integer number (5890500).

Almost surely, 2^40857887 is an apocalyptic number.

40857887 is a deficient number, since it is larger than the sum of its proper divisors (6266113).

40857887 is a wasteful number, since it uses less digits than its factorization.

40857887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53665.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 40857887 is about 6392.0174436558. The cubic root of 40857887 is about 344.4228591823.

The spelling of 40857887 in words is "forty million, eight hundred fifty-seven thousand, eight hundred eighty-seven".