40403216 has 40 divisors (see below), whose sum is σ = 90410880. Its totient is φ = 17132544.

The previous prime is 40403201. The next prime is 40403243. The reversal of 40403216 is 61230404.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9005 + ... + 12723.

It is an arithmetic number, because the mean of its divisors is an integer number (2260272).

Almost surely, 2^40403216 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 40403216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45205440).

40403216 is an abundant number, since it is smaller than the sum of its proper divisors (50007664).

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

40403216 is a wasteful number, since it uses less digits than its factorization.

40403216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831 (or 3825 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40403216 is about 6356.3524131376. The cubic root of 40403216 is about 343.1404989554.

The spelling of 40403216 in words is "forty million, four hundred three thousand, two hundred sixteen".