40011688 has 8 divisors (see below), whose sum is σ = 75021930. Its totient is φ = 20005840.

The previous prime is 40011667. The next prime is 40011709. The reversal of 40011688 is 88611004.

It is an interprime number because it is at equal distance from previous prime (40011667) and next prime (40011709).

It can be written as a sum of positive squares in only one way, i.e., 23020804 + 16990884 = 4798^2 + 4122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500723 + ... + 2500738.

Almost surely, 2^40011688 is an apocalyptic number.

It is an amenable number.

40011688 is a deficient number, since it is larger than the sum of its proper divisors (35010242).

40011688 is a wasteful number, since it uses less digits than its factorization.

40011688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001467 (or 5001463 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 40011688 is about 6325.4792703794. The cubic root of 40011688 is about 342.0284964229.

The spelling of 40011688 in words is "forty million, eleven thousand, six hundred eighty-eight".