40404330 has 96 divisors (see below), whose sum is σ = 111196800. Its totient is φ = 10158720.

The previous prime is 40404319. The next prime is 40404361. The reversal of 40404330 is 3340404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 271096 + ... + 271244.

It is an arithmetic number, because the mean of its divisors is an integer number (1158300).

Almost surely, 2^40404330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40404330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55598400).

40404330 is an abundant number, since it is smaller than the sum of its proper divisors (70792470).

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

40404330 is a wasteful number, since it uses less digits than its factorization.

40404330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40404330 is about 6356.4400414068. The cubic root of 40404330 is about 343.1436526235.

Adding to 40404330 its reverse (3340404), we get a palindrome (43744734).

The spelling of 40404330 in words is "forty million, four hundred four thousand, three hundred thirty".