40144487 has 2 divisors, whose sum is σ = 40144488. Its totient is φ = 40144486.

The previous prime is 40144483. The next prime is 40144501. The reversal of 40144487 is 78444104.

40144487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40144487 - 2² = 40144483 is a prime.

It is a super-2 number, since 2×40144487² = 3223159672986338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40144483) 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 as a sum of consecutive naturals, namely, 20072243 + 20072244.

It is an arithmetic number, because the mean of its divisors is an integer number (20072244).

Almost surely, 2^40144487 is an apocalyptic number.

40144487 is a deficient number, since it is larger than the sum of its proper divisors (1).

40144487 is an equidigital number, since it uses as much as digits as its factorization.

40144487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 40144487 is about 6335.9677240340. The cubic root of 40144487 is about 342.4064766759.

The spelling of 40144487 in words is "forty million, one hundred forty-four thousand, four hundred eighty-seven".