40078823 has 2 divisors, whose sum is σ = 40078824. Its totient is φ = 40078822.

The previous prime is 40078813. The next prime is 40078849. The reversal of 40078823 is 32887004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40078823 - 2¹⁶ = 40013287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40078823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40078813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20039411 + 20039412.

It is an arithmetic number, because the mean of its divisors is an integer number (20039412).

Almost surely, 2^40078823 is an apocalyptic number.

40078823 is a deficient number, since it is larger than the sum of its proper divisors (1).

40078823 is an equidigital number, since it uses as much as digits as its factorization.

40078823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 40078823 is about 6330.7837587458. The cubic root of 40078823 is about 342.2196843285.

The spelling of 40078823 in words is "forty million, seventy-eight thousand, eight hundred twenty-three".