40490002687 has 4 divisors (see below), whose sum is σ = 42621055480. Its totient is φ = 38358949896.

The previous prime is 40490002661. The next prime is 40490002697. The reversal of 40490002687 is 78620009404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40490002687 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 (40490002697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065526368 + ... + 1065526405.

It is an arithmetic number, because the mean of its divisors is an integer number (10655263870).

Almost surely, 2^40490002687 is an apocalyptic number.

40490002687 is a deficient number, since it is larger than the sum of its proper divisors (2131052793).

40490002687 is a wasteful number, since it uses less digits than its factorization.

40490002687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131052792.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 40490002687 in words is "forty billion, four hundred ninety million, two thousand, six hundred eighty-seven".