40424142 has 32 divisors (see below), whose sum is σ = 89326080. Its totient is φ = 12093120.

The previous prime is 40424141. The next prime is 40424149. The reversal of 40424142 is 24142404.

40424142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40424142² = 3268222512872328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40424141) 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 15 ways as a sum of consecutive naturals, for example, 1338 + ... + 9090.

It is an arithmetic number, because the mean of its divisors is an integer number (2791440).

Almost surely, 2^40424142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40424142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44663040).

40424142 is an abundant number, since it is smaller than the sum of its proper divisors (48901938).

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

40424142 is a wasteful number, since it uses less digits than its factorization.

40424142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7848.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 40424142 is about 6357.9982698960. The cubic root of 40424142 is about 343.1997295437.

Adding to 40424142 its reverse (24142404), we get a palindrome (64566546).

The spelling of 40424142 in words is "forty million, four hundred twenty-four thousand, one hundred forty-two".