40144542 has 16 divisors (see below), whose sum is σ = 82156800. Its totient is φ = 13070232.

The previous prime is 40144541. The next prime is 40144543. The reversal of 40144542 is 24544104.

It is a happy number.

40144542 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 (40144541) and next prime (40144543).

It is a super-2 number, since 2×40144542² = 3223168504779528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144541) 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 7 ways as a sum of consecutive naturals, for example, 77542 + ... + 78057.

It is an arithmetic number, because the mean of its divisors is an integer number (5134800).

Almost surely, 2^40144542 is an apocalyptic number.

40144542 is an abundant number, since it is smaller than the sum of its proper divisors (42012258).

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

40144542 is a wasteful number, since it uses less digits than its factorization.

40144542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155647.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 40144542 is about 6335.9720643324. The cubic root of 40144542 is about 342.4066330473.

Adding to 40144542 its reverse (24544104), we get a palindrome (64688646).

The spelling of 40144542 in words is "forty million, one hundred forty-four thousand, five hundred forty-two".