40663328 has 24 divisors (see below), whose sum is σ = 80216892. Its totient is φ = 20290816.

The previous prime is 40663321. The next prime is 40663369. The reversal of 40663328 is 82336604.

It can be written as a sum of positive squares in 2 ways, for example, as 33965584 + 6697744 = 5828^2 + 2588^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 40663294 and 40663303.

It is not an unprimeable number, because it can be changed into a prime (40663321) 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 3 ways as a sum of consecutive naturals, for example, 20726 + ... + 22602.

Almost surely, 2^40663328 is an apocalyptic number.

It is an amenable number.

40663328 is a deficient number, since it is larger than the sum of its proper divisors (39553564).

40663328 is a wasteful number, since it uses less digits than its factorization.

40663328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564 (or 2556 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 40663328 is about 6376.7803788432. The cubic root of 40663328 is about 343.8752928171.

The spelling of 40663328 in words is "forty million, six hundred sixty-three thousand, three hundred twenty-eight".