40688087 has 4 divisors (see below), whose sum is σ = 44387016. Its totient is φ = 36989160.

The previous prime is 40688071. The next prime is 40688099. The reversal of 40688087 is 78088604.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40688087 - 2⁴ = 40688071 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 (40688057) 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, 1849448 + ... + 1849469.

It is an arithmetic number, because the mean of its divisors is an integer number (11096754).

Almost surely, 2^40688087 is an apocalyptic number.

40688087 is a deficient number, since it is larger than the sum of its proper divisors (3698929).

40688087 is a wasteful number, since it uses less digits than its factorization.

40688087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698928.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 40688087 is about 6378.7214236083. The cubic root of 40688087 is about 343.9450713405.

The spelling of 40688087 in words is "forty million, six hundred eighty-eight thousand, eighty-seven".