40688228 has 18 divisors (see below), whose sum is σ = 82830006. Its totient is φ = 17437728.

The previous prime is 40688201. The next prime is 40688237. The reversal of 40688228 is 82288604.

40688228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 39337984 + 1350244 = 6272^2 + 1162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40688191 and 40688200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103601 + ... + 103992.

It is an arithmetic number, because the mean of its divisors is an integer number (4601667).

Almost surely, 2^40688228 is an apocalyptic number.

It is an amenable number.

40688228 is an abundant number, since it is smaller than the sum of its proper divisors (42141778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40688228 is a wasteful number, since it uses less digits than its factorization.

40688228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207611 (or 207602 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 40688228 is about 6378.7324759704. The cubic root of 40688228 is about 343.9454686411.

The spelling of 40688228 in words is "forty million, six hundred eighty-eight thousand, two hundred twenty-eight".