445724 has 6 divisors (see below), whose sum is σ = 780024. Its totient is φ = 222860.

The previous prime is 445703. The next prime is 445741. The reversal of 445724 is 427544.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 445693 and 445702.

It is a congruent number.

It is an unprimeable number.

445724 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55712 + ... + 55719.

It is an arithmetic number, because the mean of its divisors is an integer number (130004).

2⁴⁴⁵⁷²⁴ is an apocalyptic number.

It is an amenable number.

445724 is a deficient number, since it is larger than the sum of its proper divisors (334300).

445724 is a wasteful number, since it uses less digits than its factorization.

445724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111435 (or 111433 counting only the distinct ones).

The product of its digits is 4480, while the sum is 26.

The square root of 445724 is about 667.6256436058. The cubic root of 445724 is about 76.3874489401.

The spelling of 445724 in words is "four hundred forty-five thousand, seven hundred twenty-four".