40144004 has 24 divisors (see below), whose sum is σ = 76953240. Its totient is φ = 18238976.

The previous prime is 40144003. The next prime is 40144019. The reversal of 40144004 is 40044104.

It can be written as a sum of positive squares in 4 ways, for example, as 12602500 + 27541504 = 3550^2 + 5248^2 .

It is a super-2 number, since 2×40144004² = 3223082114304032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (40144003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8207 + ... + 12150.

It is an arithmetic number, because the mean of its divisors is an integer number (3206385).

Almost surely, 2^40144004 is an apocalyptic number.

It is an amenable number.

40144004 is a deficient number, since it is larger than the sum of its proper divisors (36809236).

40144004 is a wasteful number, since it uses less digits than its factorization.

40144004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20407 (or 20405 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40144004 is about 6335.9296081948. The cubic root of 40144004 is about 342.4051034446.

Adding to 40144004 its reverse (40044104), we get a palindrome (80188108).

The spelling of 40144004 in words is "forty million, one hundred forty-four thousand, four".