40688222 has 4 divisors (see below), whose sum is σ = 61032336. Its totient is φ = 20344110.

The previous prime is 40688201. The next prime is 40688237. The reversal of 40688222 is 22288604.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172054 + ... + 10172057.

It is an arithmetic number, because the mean of its divisors is an integer number (15258084).

Almost surely, 2^40688222 is an apocalyptic number.

40688222 is a deficient number, since it is larger than the sum of its proper divisors (20344114).

40688222 is a wasteful number, since it uses less digits than its factorization.

40688222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344113.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 40688222 is about 6378.7320056576. The cubic root of 40688222 is about 343.9454517347.

The spelling of 40688222 in words is "forty million, six hundred eighty-eight thousand, two hundred twenty-two".