450639 has 24 divisors (see below), whose sum is σ = 778752. Its totient is φ = 245520.

The previous prime is 450617. The next prime is 450641. The reversal of 450639 is 936054.

It is a happy number.

It is not a de Polignac number, because 450639 - 2⁸ = 450383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1294 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (32448).

2⁴⁵⁰⁶³⁹ is an apocalyptic number.

450639 is a deficient number, since it is larger than the sum of its proper divisors (328113).

450639 is a wasteful number, since it uses less digits than its factorization.

450639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 450639 is about 671.2965067688. The cubic root of 450639 is about 76.6671980639.

It can be divided in two parts, 450 and 639, that added together give a square (1089 = 33²).

The spelling of 450639 in words is "four hundred fifty thousand, six hundred thirty-nine".