40687688 has 16 divisors (see below), whose sum is σ = 76634880. Its totient is φ = 20251728.

The previous prime is 40687687. The next prime is 40687727. The reversal of 40687688 is 88678604.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40687687) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 9620 + ... + 13187.

It is an arithmetic number, because the mean of its divisors is an integer number (4789680).

Almost surely, 2^40687688 is an apocalyptic number.

It is an amenable number.

40687688 is a deficient number, since it is larger than the sum of its proper divisors (35947192).

40687688 is a wasteful number, since it uses less digits than its factorization.

40687688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23036 (or 23032 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 40687688 is about 6378.6901476714. The cubic root of 40687688 is about 343.9439470595.

The spelling of 40687688 in words is "forty million, six hundred eighty-seven thousand, six hundred eighty-eight".