449787 has 16 divisors (see below), whose sum is σ = 680960. Its totient is φ = 261792.

The previous prime is 449783. The next prime is 449797. The reversal of 449787 is 787944.

It is not a de Polignac number, because 449787 - 2² = 449783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

449787 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (449783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (42560).

2⁴⁴⁹⁷⁸⁷ is an apocalyptic number.

449787 is a deficient number, since it is larger than the sum of its proper divisors (231173).

449787 is a wasteful number, since it uses less digits than its factorization.

449787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642.

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

The square root of 449787 is about 670.6616136324. The cubic root of 449787 is about 76.6188506713.

Adding to 449787 its sum of digits (39), we get a triangular number (449826 = T₉₄₈).

The spelling of 449787 in words is "four hundred forty-nine thousand, seven hundred eighty-seven".