40198687 has 8 divisors (see below), whose sum is σ = 43081056. Its totient is φ = 37410912.

The previous prime is 40198673. The next prime is 40198703. The reversal of 40198687 is 78689104.

40198687 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 40198687 - 2¹⁵ = 40165919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40198607) 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, 22768 + ... + 24469.

It is an arithmetic number, because the mean of its divisors is an integer number (5385132).

Almost surely, 2^40198687 is an apocalyptic number.

40198687 is a deficient number, since it is larger than the sum of its proper divisors (2882369).

40198687 is a wasteful number, since it uses less digits than its factorization.

40198687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47297.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 40198687 is about 6340.2434495846. The cubic root of 40198687 is about 342.5605043446.

The spelling of 40198687 in words is "forty million, one hundred ninety-eight thousand, six hundred eighty-seven".