449869 has 6 divisors (see below), whose sum is σ = 523374. Its totient is φ = 385560.

The previous prime is 449851. The next prime is 449879. The reversal of 449869 is 968944.

It can be written as a sum of positive squares in only one way, i.e., 405769 + 44100 = 637^2 + 210^2 .

It is not a de Polignac number, because 449869 - 2⁷ = 449741 is a prime.

It is a super-2 number, since 2×449869² = 404764234322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4542 + ... + 4639.

It is an arithmetic number, because the mean of its divisors is an integer number (87229).

2⁴⁴⁹⁸⁶⁹ is an apocalyptic number.

449869 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

449869 is a deficient number, since it is larger than the sum of its proper divisors (73505).

449869 is an equidigital number, since it uses as much as digits as its factorization.

449869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195 (or 9188 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 449869 is about 670.7227445077. The cubic root of 449869 is about 76.6235064780.

The spelling of 449869 in words is "four hundred forty-nine thousand, eight hundred sixty-nine".