40423320 has 128 divisors (see below), whose sum is σ = 154022400. Its totient is φ = 9237888.

The previous prime is 40423301. The next prime is 40423321. The reversal of 40423320 is 2332404.

40423320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 40423293 and 40423302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423321) 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 31 ways as a sum of consecutive naturals, for example, 4887 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (1203300).

Almost surely, 2^40423320 is an apocalyptic number.

40423320 is a gapful number since it is divisible by the number (40) 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 40423320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77011200).

40423320 is an abundant number, since it is smaller than the sum of its proper divisors (113599080).

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

40423320 is a wasteful number, since it uses less digits than its factorization.

40423320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374 (or 5364 counting only the distinct ones).

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

The square root of 40423320 is about 6357.9336265803. The cubic root of 40423320 is about 343.1974032764.

Adding to 40423320 its reverse (2332404), we get a palindrome (42755724).

The spelling of 40423320 in words is "forty million, four hundred twenty-three thousand, three hundred twenty".