244890581 has 16 divisors (see below), whose sum is σ = 275289840. Its totient is φ = 216353280.

The previous prime is 244890577. The next prime is 244890623. The reversal of 244890581 is 185098442.

244890581 = 11065² + 11066².

It can be written as a sum of positive squares in 8 ways, for example, as 35509681 + 209380900 = 5959^2 + 14470^2 .

It is not a de Polignac number, because 244890581 - 2² = 244890577 is a prime.

It is a super-2 number, since 2×244890581² = 119942793325035122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244890521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23915 + ... + 32583.

It is an arithmetic number, because the mean of its divisors is an integer number (17205615).

Almost surely, 2^244890581 is an apocalyptic number.

244890581 is the 11066-th centered square number.

It is an amenable number.

244890581 is a deficient number, since it is larger than the sum of its proper divisors (30399259).

244890581 is a wasteful number, since it uses less digits than its factorization.

244890581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8776.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 244890581 is about 15648.9801904150. The cubic root of 244890581 is about 625.6393082862.

The spelling of 244890581 in words is "two hundred forty-four million, eight hundred ninety thousand, five hundred eighty-one".