40061144 has 8 divisors (see below), whose sum is σ = 75114660. Its totient is φ = 20030568.

The previous prime is 40061123. The next prime is 40061149. The reversal of 40061144 is 44116004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40061149) 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 as a sum of consecutive naturals, namely, 2503814 + ... + 2503829.

Almost surely, 2^40061144 is an apocalyptic number.

It is an amenable number.

40061144 is a deficient number, since it is larger than the sum of its proper divisors (35053516).

40061144 is a wasteful number, since it uses less digits than its factorization.

40061144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5007649 (or 5007645 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40061144 is about 6329.3873321199. The cubic root of 40061144 is about 342.1693585692.

Adding to 40061144 its reverse (44116004), we get a palindrome (84177148).

The spelling of 40061144 in words is "forty million, sixty-one thousand, one hundred forty-four".