40421304 has 192 divisors, whose sum is σ = 142871040. Its totient is φ = 10010880.

The previous prime is 40421299. The next prime is 40421309. The reversal of 40421304 is 40312404.

40421304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40421299) and next prime (40421309).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127354 + ... + 127670.

It is an arithmetic number, because the mean of its divisors is an integer number (744120).

Almost surely, 2^40421304 is an apocalyptic number.

40421304 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40421304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71435520).

40421304 is an abundant number, since it is smaller than the sum of its proper divisors (102449736).

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

40421304 is a wasteful number, since it uses less digits than its factorization.

40421304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40421304 is about 6357.7750825269. The cubic root of 40421304 is about 343.1916978447.

Adding to 40421304 its reverse (40312404), we get a palindrome (80733708).

Subtracting from 40421304 its reverse (40312404), we obtain a square (108900 = 330²).

The spelling of 40421304 in words is "forty million, four hundred twenty-one thousand, three hundred four".