445544532 has 72 divisors (see below), whose sum is σ = 1145361672. Its totient is φ = 146016000.

The previous prime is 445544531. The next prime is 445544563. The reversal of 445544532 is 235445544.

It can be written as a sum of positive squares in 4 ways, for example, as 184851216 + 260693316 = 13596^2 + 16146^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445544531) 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, 657778 + ... + 658454.

It is an arithmetic number, because the mean of its divisors is an integer number (15907801).

Almost surely, 2^445544532 is an apocalyptic number.

It is an amenable number.

445544532 is an abundant number, since it is smaller than the sum of its proper divisors (699817140).

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

445544532 is a wasteful number, since it uses less digits than its factorization.

445544532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 964 counting only the distinct ones).

The product of its digits is 192000, while the sum is 36.

The square root of 445544532 is about 21107.9258099890. The cubic root of 445544532 is about 763.7719525317.

The spelling of 445544532 in words is "four hundred forty-five million, five hundred forty-four thousand, five hundred thirty-two".