444621492 has 108 divisors (see below), whose sum is σ = 1313659620. Its totient is φ = 126427392.

The previous prime is 444621491. The next prime is 444621517. The reversal of 444621492 is 294126444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26255376 + 418366116 = 5124^2 + 20454^2 .

It is a super-2 number, since 2×444621492² = 395376542296612128, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444621491) 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 35 ways as a sum of consecutive naturals, for example, 474048 + ... + 474984.

It is an arithmetic number, because the mean of its divisors is an integer number (12163515).

Almost surely, 2^444621492 is an apocalyptic number.

444621492 is a gapful number since it is divisible by the number (42) 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 444621492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656829810).

444621492 is an abundant number, since it is smaller than the sum of its proper divisors (869038128).

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

444621492 is a wasteful number, since it uses less digits than its factorization.

444621492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230 (or 1218 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 444621492 is about 21086.0497011650. The cubic root of 444621492 is about 763.2441493453.

It can be divided in two parts, 44462 and 1492, that added together give a palindrome (45954).

The spelling of 444621492 in words is "four hundred forty-four million, six hundred twenty-one thousand, four hundred ninety-two".