40408328 has 8 divisors (see below), whose sum is σ = 75765630. Its totient is φ = 20204160.

The previous prime is 40408327. The next prime is 40408363. The reversal of 40408328 is 82380404.

It can be written as a sum of positive squares in only one way, i.e., 32467204 + 7941124 = 5698^2 + 2818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 40408328.

It is not an unprimeable number, because it can be changed into a prime (40408321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525513 + ... + 2525528.

Almost surely, 2^40408328 is an apocalyptic number.

It is an amenable number.

40408328 is a deficient number, since it is larger than the sum of its proper divisors (35357302).

40408328 is a wasteful number, since it uses less digits than its factorization.

40408328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051047 (or 5051043 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 40408328 is about 6356.7545178338. The cubic root of 40408328 is about 343.1549702478.

The spelling of 40408328 in words is "forty million, four hundred eight thousand, three hundred twenty-eight".