40688375 has 64 divisors (see below), whose sum is σ = 64646400. Its totient is φ = 25401600.

The previous prime is 40688371. The next prime is 40688383. The reversal of 40688375 is 57388604.

It is a happy number.

It is not a de Polignac number, because 40688375 - 2² = 40688371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40688371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 557339 + ... + 557411.

It is an arithmetic number, because the mean of its divisors is an integer number (1010100).

Almost surely, 2^40688375 is an apocalyptic number.

40688375 is a deficient number, since it is larger than the sum of its proper divisors (23958025).

40688375 is an equidigital number, since it uses as much as digits as its factorization.

40688375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 40688375 is about 6378.7439986254. The cubic root of 40688375 is about 343.9458828471.

The spelling of 40688375 in words is "forty million, six hundred eighty-eight thousand, three hundred seventy-five".