40569228 has 96 divisors (see below), whose sum is σ = 121605120. Its totient is φ = 11456640.

The previous prime is 40569227. The next prime is 40569251. The reversal of 40569228 is 82296504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40569192 and 40569201.

It is not an unprimeable number, because it can be changed into a prime (40569223) 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 31 ways as a sum of consecutive naturals, for example, 77608 + ... + 78128.

It is an arithmetic number, because the mean of its divisors is an integer number (1266720).

Almost surely, 2^40569228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40569228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60802560).

40569228 is an abundant number, since it is smaller than the sum of its proper divisors (81035892).

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

40569228 is a wasteful number, since it uses less digits than its factorization.

40569228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 40569228 is about 6369.3977737303. The cubic root of 40569228 is about 343.6098312046.

The spelling of 40569228 in words is "forty million, five hundred sixty-nine thousand, two hundred twenty-eight".