540542440 has 16 divisors (see below), whose sum is σ = 1216220580. Its totient is φ = 216216960.

The previous prime is 540542423. The next prime is 540542449. The reversal of 540542440 is 44245045.

It can be written as a sum of positive squares in 2 ways, for example, as 515562436 + 24980004 = 22706^2 + 4998^2 .

It is a super-2 number, since 2×540542440² = 584372258882307200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 540542399 and 540542408.

It is not an unprimeable number, because it can be changed into a prime (540542449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6756741 + ... + 6756820.

Almost surely, 2^540542440 is an apocalyptic number.

It is an amenable number.

540542440 is an abundant number, since it is smaller than the sum of its proper divisors (675678140).

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

540542440 is a wasteful number, since it uses less digits than its factorization.

540542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13513572 (or 13513568 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 540542440 is about 23249.5685981482. The cubic root of 540542440 is about 814.5978620056.

Adding to 540542440 its reverse (44245045), we get a palindrome (584787485).

The spelling of 540542440 in words is "five hundred forty million, five hundred forty-two thousand, four hundred forty".