1445664 has 72 divisors (see below), whose sum is σ = 4254768. Its totient is φ = 426240.

The previous prime is 1445657. The next prime is 1445669. The reversal of 1445664 is 4665441.

It is not an unprimeable number, because it can be changed into a prime (1445669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39054 + ... + 39090.

It is an arithmetic number, because the mean of its divisors is an integer number (59094).

2^1445664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2127384).

1445664 is an abundant number, since it is smaller than the sum of its proper divisors (2809104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445664 is a wasteful number, since it uses less digits than its factorization.

1445664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 53 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 1445664 is about 1202.3576838861. The cubic root of 1445664 is about 113.0721861057.

The spelling of 1445664 in words is "one million, four hundred forty-five thousand, six hundred sixty-four".