444645 has 24 divisors (see below), whose sum is σ = 792792. Its totient is φ = 230400.

The previous prime is 444641. The next prime is 444649. The reversal of 444645 is 546444.

It is an interprime number because it is at equal distance from previous prime (444641) and next prime (444649).

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 431649 = 114^2 + 657^2 .

It is not a de Polignac number, because 444645 - 2² = 444641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444641) 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, 1725 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (33033).

2⁴⁴⁴⁶⁴⁵ is an apocalyptic number.

444645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

444645 is a deficient number, since it is larger than the sum of its proper divisors (348147).

444645 is a wasteful number, since it uses less digits than its factorization.

444645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 290 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 444645 is about 666.8170663683. The cubic root of 444645 is about 76.3257600507.

It can be divided in two parts, 444 and 645, that added together give a square (1089 = 33²).

The spelling of 444645 in words is "four hundred forty-four thousand, six hundred forty-five".