540128644 has 12 divisors (see below), whose sum is σ = 1031154768. Its totient is φ = 245513000.

The previous prime is 540128639. The next prime is 540128647. The reversal of 540128644 is 446821045.

It is not an unprimeable number, because it can be changed into a prime (540128647) 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 3 ways as a sum of consecutive naturals, for example, 6137782 + ... + 6137869.

It is an arithmetic number, because the mean of its divisors is an integer number (85929564).

Almost surely, 2^540128644 is an apocalyptic number.

It is an amenable number.

540128644 is a deficient number, since it is larger than the sum of its proper divisors (491026124).

540128644 is a wasteful number, since it uses less digits than its factorization.

540128644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12275666 (or 12275664 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 540128644 is about 23240.6678905749. The cubic root of 540128644 is about 814.3899453144.

Adding to 540128644 its reverse (446821045), we get a palindrome (986949689).

The spelling of 540128644 in words is "five hundred forty million, one hundred twenty-eight thousand, six hundred forty-four".