445138722 has 96 divisors (see below), whose sum is σ = 1137427200. Its totient is φ = 123171840.

The previous prime is 445138721. The next prime is 445138747. The reversal of 445138722 is 227831544.

It is a happy number.

445138722 is a `hidden beast` number, since 44 + 513 + 87 + 22 = 666.

It is not an unprimeable number, because it can be changed into a prime (445138721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1027818 + ... + 1028250.

It is an arithmetic number, because the mean of its divisors is an integer number (11848200).

Almost surely, 2^445138722 is an apocalyptic number.

445138722 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 445138722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568713600).

445138722 is an abundant number, since it is smaller than the sum of its proper divisors (692288478).

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

445138722 is a wasteful number, since it uses less digits than its factorization.

445138722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 685 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 445138722 is about 21098.3108802577. The cubic root of 445138722 is about 763.5399963351.

It can be divided in two parts, 44513 and 8722, that added together give a palindrome (53235).

The spelling of 445138722 in words is "four hundred forty-five million, one hundred thirty-eight thousand, seven hundred twenty-two".