44447978 has 4 divisors (see below), whose sum is σ = 66671970. Its totient is φ = 22223988.

The previous prime is 44447971. The next prime is 44447987. The reversal of 44447978 is 87974444.

44447978 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 can be written as a sum of positive squares in only one way, i.e., 38031889 + 6416089 = 6167^2 + 2533^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44447971) 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, 11111993 + ... + 11111996.

Almost surely, 2^44447978 is an apocalyptic number.

44447978 is a deficient number, since it is larger than the sum of its proper divisors (22223992).

44447978 is a wasteful number, since it uses less digits than its factorization.

44447978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22223991.

The product of its digits is 903168, while the sum is 47.

The square root of 44447978 is about 6666.9316780660. The cubic root of 44447978 is about 354.2289102198.

The spelling of 44447978 in words is "forty-four million, four hundred forty-seven thousand, nine hundred seventy-eight".