40342420 has 12 divisors (see below), whose sum is σ = 84719124. Its totient is φ = 16136960.

The previous prime is 40342417. The next prime is 40342427. The reversal of 40342420 is 2424304.

40342420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26234884 + 14107536 = 5122^2 + 3756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40342427) 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 3 ways as a sum of consecutive naturals, for example, 1008541 + ... + 1008580.

It is an arithmetic number, because the mean of its divisors is an integer number (7059927).

Almost surely, 2^40342420 is an apocalyptic number.

It is an amenable number.

40342420 is an abundant number, since it is smaller than the sum of its proper divisors (44376704).

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

40342420 is a wasteful number, since it uses less digits than its factorization.

40342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017130 (or 2017128 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40342420 is about 6351.5683102679. The cubic root of 40342420 is about 342.9683010936.

Adding to 40342420 its reverse (2424304), we get a palindrome (42766724).

The spelling of 40342420 in words is "forty million, three hundred forty-two thousand, four hundred twenty".