544021540 has 12 divisors (see below), whose sum is σ = 1142445276. Its totient is φ = 217608608.

The previous prime is 544021519. The next prime is 544021559. The reversal of 544021540 is 45120445.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 145540096 + 398481444 = 12064^2 + 19962^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13600519 + ... + 13600558.

It is an arithmetic number, because the mean of its divisors is an integer number (95203773).

Almost surely, 2^544021540 is an apocalyptic number.

It is an amenable number.

544021540 is an abundant number, since it is smaller than the sum of its proper divisors (598423736).

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

544021540 is a wasteful number, since it uses less digits than its factorization.

544021540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27201086 (or 27201084 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 544021540 is about 23324.2693347509. The cubic root of 544021540 is about 816.3417946102.

Adding to 544021540 its reverse (45120445), we get a palindrome (589141985).

The spelling of 544021540 in words is "five hundred forty-four million, twenty-one thousand, five hundred forty".