144446778 has 48 divisors (see below), whose sum is σ = 376509120. Its totient is φ = 39097728.

The previous prime is 144446777. The next prime is 144446791. The reversal of 144446778 is 877644441.

It is a happy number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (144446777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27775 + ... + 32562.

It is an arithmetic number, because the mean of its divisors is an integer number (7843940).

Almost surely, 2^144446778 is an apocalyptic number.

144446778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

144446778 is an abundant number, since it is smaller than the sum of its proper divisors (232062342).

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

144446778 is a wasteful number, since it uses less digits than its factorization.

144446778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60371 (or 60368 counting only the distinct ones).

The product of its digits is 602112, while the sum is 45.

The square root of 144446778 is about 12018.6013329339. The cubic root of 144446778 is about 524.6897977019.

The spelling of 144446778 in words is "one hundred forty-four million, four hundred forty-six thousand, seven hundred seventy-eight".