40078745 has 8 divisors (see below), whose sum is σ = 54965184. Its totient is φ = 27482544.

The previous prime is 40078729. The next prime is 40078781. The reversal of 40078745 is 54787004.

It is a happy number.

40078745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40078745 - 2⁴ = 40078729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 1145107 = 40078745 / (4 + 0 + 0 + 7 + 8 + 7 + 4 + 5).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 572519 + ... + 572588.

It is an arithmetic number, because the mean of its divisors is an integer number (6870648).

Almost surely, 2^40078745 is an apocalyptic number.

It is an amenable number.

40078745 is a deficient number, since it is larger than the sum of its proper divisors (14886439).

40078745 is a wasteful number, since it uses less digits than its factorization.

40078745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145119.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 40078745 is about 6330.7775983681. Note that the first 3 decimals coincide. The cubic root of 40078745 is about 342.2194623231.

The spelling of 40078745 in words is "forty million, seventy-eight thousand, seven hundred forty-five".