40506987 has 8 divisors (see below), whose sum is σ = 55751680. Its totient is φ = 26133480.

The previous prime is 40506953. The next prime is 40507001. The reversal of 40506987 is 78960504.

40506987 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 not a de Polignac number, because 40506987 - 2⁶ = 40506923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40506287) 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, 217687 + ... + 217872.

It is an arithmetic number, because the mean of its divisors is an integer number (6968960).

Almost surely, 2^40506987 is an apocalyptic number.

40506987 is a deficient number, since it is larger than the sum of its proper divisors (15244693).

40506987 is a wasteful number, since it uses less digits than its factorization.

40506987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435593.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 40506987 is about 6364.5099575694. The cubic root of 40506987 is about 343.4340200710.

The spelling of 40506987 in words is "forty million, five hundred six thousand, nine hundred eighty-seven".