449643649 has 24 divisors (see below), whose sum is σ = 564677568. Its totient is φ = 354886560.

The previous prime is 449643631. The next prime is 449643653. The reversal of 449643649 is 946346944.

It is not a de Polignac number, because 449643649 - 2⁹ = 449643137 is a prime.

It is a super-4 number, since 4×449643649⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (449643049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411594 + ... + 412684.

It is an arithmetic number, because the mean of its divisors is an integer number (23528232).

Almost surely, 2^449643649 is an apocalyptic number.

449643649 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

449643649 is a deficient number, since it is larger than the sum of its proper divisors (115033919).

449643649 is a wasteful number, since it uses less digits than its factorization.

449643649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1758 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 49.

The square root of 449643649 is about 21204.8024984908. The cubic root of 449643649 is about 766.1071011001.

The spelling of 449643649 in words is "four hundred forty-nine million, six hundred forty-three thousand, six hundred forty-nine".