40406228 has 6 divisors (see below), whose sum is σ = 70710906. Its totient is φ = 20203112.

The previous prime is 40406167. The next prime is 40406273. The reversal of 40406228 is 82260404.

It can be written as a sum of positive squares in only one way, i.e., 34245904 + 6160324 = 5852^2 + 2482^2 .

It is a super-2 number, since 2×40406228² = 3265326522375968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40406197 and 40406206.

It is a congruent number.

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, 5050775 + ... + 5050782.

It is an arithmetic number, because the mean of its divisors is an integer number (11785151).

Almost surely, 2^40406228 is an apocalyptic number.

It is an amenable number.

40406228 is a deficient number, since it is larger than the sum of its proper divisors (30304678).

40406228 is a wasteful number, since it uses less digits than its factorization.

40406228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101561 (or 10101559 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 40406228 is about 6356.5893370580. The cubic root of 40406228 is about 343.1490256158.

The spelling of 40406228 in words is "forty million, four hundred six thousand, two hundred twenty-eight".