40547778 has 8 divisors (see below), whose sum is σ = 81095568. Its totient is φ = 13515924.

The previous prime is 40547747. The next prime is 40547779. The reversal of 40547778 is 87774504.

40547778 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.

40547778 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40547779) 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 in 3 ways as a sum of consecutive naturals, for example, 3378976 + ... + 3378987.

It is an arithmetic number, because the mean of its divisors is an integer number (10136946).

Almost surely, 2^40547778 is an apocalyptic number.

40547778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40547778 is a wasteful number, since it uses less digits than its factorization.

40547778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757968.

The product of its (nonzero) digits is 219520, while the sum is 42.

The square root of 40547778 is about 6367.7137184393. The cubic root of 40547778 is about 343.5492620606.

The spelling of 40547778 in words is "forty million, five hundred forty-seven thousand, seven hundred seventy-eight".