491244444 has 72 divisors (see below), whose sum is σ = 1321931520. Its totient is φ = 153280512.

The previous prime is 491244437. The next prime is 491244463. The reversal of 491244444 is 444442194.

It is a super-2 number, since 2×491244444² = 482642207521738272, 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.

491244444 is a modest number, since divided by 44444 gives 4912 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 491244399 and 491244408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116037 + ... + 120195.

It is an arithmetic number, because the mean of its divisors is an integer number (18360160).

Almost surely, 2^491244444 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 491244444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660965760).

491244444 is an abundant number, since it is smaller than the sum of its proper divisors (830687076).

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

491244444 is a wasteful number, since it uses less digits than its factorization.

491244444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379 (or 4374 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 491244444 is about 22164.0349214668. The cubic root of 491244444 is about 789.0403580199.

The spelling of 491244444 in words is "four hundred ninety-one million, two hundred forty-four thousand, four hundred forty-four".