40247078 has 4 divisors (see below), whose sum is σ = 60370620. Its totient is φ = 20123538.

The previous prime is 40247071. The next prime is 40247093. The reversal of 40247078 is 87074204.

40247078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40247071) 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, 10061768 + ... + 10061771.

It is an arithmetic number, because the mean of its divisors is an integer number (15092655).

Almost surely, 2^40247078 is an apocalyptic number.

40247078 is a deficient number, since it is larger than the sum of its proper divisors (20123542).

40247078 is a wasteful number, since it uses less digits than its factorization.

40247078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20123541.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 40247078 is about 6344.0584801844. The cubic root of 40247078 is about 342.6979068266.

The spelling of 40247078 in words is "forty million, two hundred forty-seven thousand, seventy-eight".