40000087 has 4 divisors (see below), whose sum is σ = 40013536. Its totient is φ = 39986640.

The previous prime is 40000061. The next prime is 40000123. The reversal of 40000087 is 78000004.

It is a happy number.

40000087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40000087 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 (40000487) 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 3 ways as a sum of consecutive naturals, for example, 63 + ... + 8944.

It is an arithmetic number, because the mean of its divisors is an integer number (10003384).

Almost surely, 2^40000087 is an apocalyptic number.

40000087 is a deficient number, since it is larger than the sum of its proper divisors (13449).

40000087 is an equidigital number, since it uses as much as digits as its factorization.

40000087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13448.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 40000087 is about 6324.5621982869. The cubic root of 40000087 is about 341.9954372817.

The spelling of 40000087 in words is "forty million, eighty-seven", and thus it is an aban number and an uban number.