40878143 has 2 divisors, whose sum is σ = 40878144. Its totient is φ = 40878142.

The previous prime is 40878133. The next prime is 40878221. The reversal of 40878143 is 34187804.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40878143 - 2⁴ = 40878127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40878133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20439071 + 20439072.

It is an arithmetic number, because the mean of its divisors is an integer number (20439072).

Almost surely, 2^40878143 is an apocalyptic number.

40878143 is a deficient number, since it is larger than the sum of its proper divisors (1).

40878143 is an equidigital number, since it uses as much as digits as its factorization.

40878143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 40878143 is about 6393.6017235984. The cubic root of 40878143 is about 344.4797676304.

The spelling of 40878143 in words is "forty million, eight hundred seventy-eight thousand, one hundred forty-three".