449778 has 16 divisors (see below), whose sum is σ = 1028160. Its totient is φ = 128496.

The previous prime is 449773. The next prime is 449783. The reversal of 449778 is 877944.

It is an interprime number because it is at equal distance from previous prime (449773) and next prime (449783).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 449778.

It is not an unprimeable number, because it can be changed into a prime (449773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5313 + ... + 5396.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2⁴⁴⁹⁷⁷⁸ is an apocalyptic number.

449778 is an abundant number, since it is smaller than the sum of its proper divisors (578382).

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

449778 is a wasteful number, since it uses less digits than its factorization.

449778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10721.

The product of its digits is 56448, while the sum is 39.

The square root of 449778 is about 670.6549038067. The cubic root of 449778 is about 76.6183396336.

The spelling of 449778 in words is "four hundred forty-nine thousand, seven hundred seventy-eight".