449978 has 8 divisors (see below), whose sum is σ = 689472. Its totient is φ = 220156.

The previous prime is 449971. The next prime is 449987. The reversal of 449978 is 879944.

449978 is nontrivially palindromic in base 15.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×449978³ = 273334906960168056, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (449971) by changing a digit.

449978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 2300 + ... + 2487.

It is an arithmetic number, because the mean of its divisors is an integer number (86184).

2⁴⁴⁹⁹⁷⁸ is an apocalyptic number.

449978 is a deficient number, since it is larger than the sum of its proper divisors (239494).

449978 is a wasteful number, since it uses less digits than its factorization.

449978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4836.

The product of its digits is 72576, while the sum is 41.

The square root of 449978 is about 670.8039952177. The cubic root of 449978 is about 76.6296944184.

It can be divided in two parts, 44997 and 8, that multiplied together give a triangular number (359976 = T₈₄₈).

The spelling of 449978 in words is "four hundred forty-nine thousand, nine hundred seventy-eight".