40009332 has 48 divisors (see below), whose sum is σ = 102884544. Its totient is φ = 12000000.

The previous prime is 40009303. The next prime is 40009337. The reversal of 40009332 is 23390004.

It is a junction number, because it is equal to n+sod(n) for n = 40009299 and 40009308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40009337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11832 + ... + 14832.

It is an arithmetic number, because the mean of its divisors is an integer number (2143428).

Almost surely, 2^40009332 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 40009332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51442272).

40009332 is an abundant number, since it is smaller than the sum of its proper divisors (62875212).

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

40009332 is a wasteful number, since it uses less digits than its factorization.

40009332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120 (or 3118 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 40009332 is about 6325.2930366901. The cubic root of 40009332 is about 342.0217830932.

Adding to 40009332 its reverse (23390004), we get a palindrome (63399336).

The spelling of 40009332 in words is "forty million, nine thousand, three hundred thirty-two".