40423008 has 144 divisors (see below), whose sum is σ = 118831104. Its totient is φ = 12011520.

The previous prime is 40423001. The next prime is 40423057. The reversal of 40423008 is 80032404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423001) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 860041 + ... + 860087.

It is an arithmetic number, because the mean of its divisors is an integer number (825216).

Almost surely, 2^40423008 is an apocalyptic number.

40423008 is a gapful number since it is divisible by the number (48) 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 40423008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59415552).

40423008 is an abundant number, since it is smaller than the sum of its proper divisors (78408096).

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

40423008 is a wasteful number, since it uses less digits than its factorization.

40423008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40423008 is about 6357.9090902592. The cubic root of 40423008 is about 343.1965203053.

The spelling of 40423008 in words is "forty million, four hundred twenty-three thousand, eight".