445500000 has 420 divisors, whose sum is σ = 1786617756. Its totient is φ = 108000000.

The previous prime is 445499987. The next prime is 445500007. The reversal of 445500000 is 5544.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445500007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 69 ways as a sum of consecutive naturals, for example, 40499995 + ... + 40500005.

Almost surely, 2^445500000 is an apocalyptic number.

445500000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (893308878).

445500000 is an abundant number, since it is smaller than the sum of its proper divisors (1341117756).

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

445500000 is an frugal number, since it uses more digits than its factorization.

445500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 445500000 is about 21106.8709192054. The cubic root of 445500000 is about 763.7465054489.

Adding to 445500000 its reverse (5544), we get a palindrome (445505544).

The spelling of 445500000 in words is "four hundred forty-five million, five hundred thousand".