40778889 has 8 divisors (see below), whose sum is σ = 55397952. Its totient is φ = 26672880.

The previous prime is 40778873. The next prime is 40778923. The reversal of 40778889 is 98887704.

40778889 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 not a de Polignac number, because 40778889 - 2⁴ = 40778873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40778809) 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 7 ways as a sum of consecutive naturals, for example, 128077 + ... + 128394.

It is an arithmetic number, because the mean of its divisors is an integer number (6924744).

Almost surely, 2^40778889 is an apocalyptic number.

It is an amenable number.

40778889 is a deficient number, since it is larger than the sum of its proper divisors (14619063).

40778889 is a wasteful number, since it uses less digits than its factorization.

40778889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256527.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 40778889 is about 6385.8350276217. The cubic root of 40778889 is about 344.2007374677.

The spelling of 40778889 in words is "forty million, seven hundred seventy-eight thousand, eight hundred eighty-nine".